Welcome to growing! It is a TON of fun and you can put as much or as little time into it as you want. I've found that it's easy to get lost for a VERY long time in my tent where there are no clocks and the outside world doesn't matter. There's been times where my husband has searched the house and the yard for me only to find me in the tent with my plants.
I second OldManGrower - you will f-it up and that's okay, that's part of the fun! I learn something every grow which is why I keep a grow journal so that I can reference past grows and see what worked or didn't work when dealing with different situations. As long as you learn something useful for your next grow, that's really what matters. And in my experience, it's REALLY hard to mess things up so bad that you need to scrap everything and start over. Not impossible, but difficult

Remember, cannabis is a plant and it wants to grow!
Your plants look healthy and happy so that's a plus! Without the information that someone else mentioned, it's hard to tell too much about them so in future posts, the more info, the better. Understandably with this being your first grow, you don't yet know what's important, so keep an eye out on the other threads to see what kind of info people post about their grows when asking questions.
Now to your questions:
- Yes, it definitely looks like you're going to run out of room. Training is great for yields, yes indeed, but that's only a byproduct of why we train. We train partly for height but just as importantly, we train so that as many bud sites are exposed to fresh air and light. (Remember from elementary school...light is food for plants!) That fresh air and light makes the buds grow and fatten up increasing yields. For more info, as OldManGrower said, go to growweedeasy.com and search plant training and you'll have more information that you know what to do with! **See note below**
- I don't know that you can transplant from hydro as I grow in soil. Someone else may have some insight, but at the same time, if you feel like experimenting, f*ck around and find out!
- Your lights don't look like they've been made for cannabis growing. Although it's amazing to see what people do with the resources that they have so nothing's impossible. Although doing a job with the correct tools will make your job easier. There's also some great reviews for different kinds of lights for different budgets on GWE so take a look into those articles as well.
- Regarding males, at this point, get rid of them. They do not produce bud and they will pollinate your females which will result in lots of seeds and significantly reduced yields. Also, as someone mentioned before, pollen sticks around for a while and there is a risk of pollen from one grow to spoil future grows in the same space.
- Lastly, it looks like you're growing in a walkout basement or something similar in more of an open space. You will want to seriously look into getting a grow tent. One of the biggest reasons is that in the flowering stage your plants will need 12 hours of COMPLETE darkness otherwise they'll do weird things...think feeding a Gremlin after midnight! It will also help you to control temperatures and humidity, ventilation, circulation, etc. No need to get anything fancy as long as it keeps the light out. If you don't want to get a tent, there are some very clever things people have done using closets, unused rooms, cupboards, etc. I'm not clever enough to do those things though I am jealous of those who are so creative!
All good questions and great to have a new grower here! Your plants look young so you can either let them run and see how they turn out or you can toss them and start fresh. Personally, since you haven't spent money on your beans, I'd say purchase some seeds from a reputable breeder (bet you'll be surprised to know that there are articles on that on GWE as well...). This way, you get to enjoy what you grow after your harvest instead of just hoping for the best. Additionally, not even the best grower in the world can grow good cannabis from poor seed genetics. Starting with good genetics will make your life MUCH easier! While you're deciding on what strain to go with, you can research lights, as well as growing methods (ie. hydro or soil, organic or synthetic, etc.) and get yourself completely set up based on your resources and situation.
Keep us posted and good luck! Welcome to the forums!
**Note: One of the biggest mistakes new growers make is loving their plants TOO MUCH! This usually comes from a very good place, but remember you won't do it perfectly the first time or second time, and hopefully you're still learning after your 100th time! So, while there is tons of info available, remember that you don't need to use it all at once. Just because you have a toolbox full of fancy tools, it doesn't necessarily mean that you need to use all the tools at the same time for a job. A hammer is still pretty much your best bet for driving a nail into a board.**