Heres a thread about starting MMA
1. 6'2" is tall for your weight, expecially as your fighting weight could be as long as 170lbs. Theres an argument that different body types are better at different things, but I'm not too sure I believe that anymore. Lanky guys tend to clean up at BJJ and are natural kickboxers, but thats not to say that the only thing you should do. See what feels right and go from there.
2. Bench is over-rated for fighting, as you're more likely to use back muscles than chest muscles. I have no idea if thats a good squat for someone your size, but I wouldn't be too concerned with strength training right now. Its going to be years before you're ready to fight and your body will change dramatically in that time frame, so just work on getting a skill set for now and worry about weights later.
3. I'm of the opinion you should never train with videos until you've spent some time training with an actual instructor, as its too easy to iron in poor movement and structure when using videos. Videos can help you down the road with new ideas and/or techniques for your game, but you need a game before any of that matters.