For someone that has been playing only a few months you are doing really well, and to the people that say you have no chance to play even in a lower rec league are talking bollox, who is anyone to say what your motivation is??.... I would get a skills pad if you do not have one and look online for off ice stick handling drills, as I keep banging on you need to be consistent to get better and do not have the thoughts of "not today but tomorrow" have a daily training routine. I am a huge fan of one to one coaching and you do need some pointers to help with body postion and technique but that is very common even for advanced players, is there someone local who is a coach that can help you??.. Do not shy away from roller hockey, there is enough "ice like" chassis out there now that make the transition from roller to ice far easier than it once was defo something to look into as you can train almost anywhere. 5 minutes shift are no use what so ever, 45 seconds to 1 minute max is what you need to aim for sadly this is rare in rec hockey normally due to poor coaching or the lack of a coach , hence you are blowing out your ass after the first period. All in you need to take the ruff with the smooth and be happy with small gains in your game, as you get older it does get harder but you still have 30+years to play this game just be consistant..