Lack of vision to see obvious threat/captures

Yes.  Rob, right now opening theory is no where near as important as tactics!  But I think it is good to learn an opening and keep it simple (one as black and one as white) if you have the time at the end.  My reason for this is so you can become comfortable with the positions you encounter and can be aware of some traps and plans ect.

guys, doesn't 28. Rxg6 win, sorry if im missing something

You're not missing anything. Rxg6+ would win regardless of the reply. Many things would have won all throughout the game I think though. 

Like some other fellows said, i am impressed also. Very good first moves by someone rated what <1000~? and playing only for few monhts. I even see some interesting ideas  i like it. It might be wrong, but bad plan is better than no plan at all.  I have seen players higher rated, playing for years who don't have plan at all.. What you need now is to focus on tactics extensively. You have ~650 tactic rating on chesscom which indicates you blunder or don't see pieces on the board even on simple positions. Experience and tactics. That's the key.  Play more, solve more tactics. Don't focus much on openings, game of chess is so vast you can be lost on move 5 very quickly even if you study many openings for months. Watch videos with comentary, see how high rated handle the game. Gain experience with blitz, it will improve your board vision quickly at least. I'll track you, really love to see improvements.

@AIM-AceMove Thank you. I have took the advice of others and started using the tactics trainer and I'm getting a little better every session I'm aiming to be at 700 by saturday.

i am currently reading a beginner book by lev alburt, he says visualization is the key to success, and that beginners should memorize the chessboard after learning the rules so you can visualize the board in your head perfectly.

when he says perfectly he really means it, if someone asked you the colour of d6 you should be able to respond instantly without thinking, until then nothing else matters.

Yes, i was thinking to say that - but might be too hard for beginners and not absolutely necessary. But give it a try. Have a board next to you - empty no pieces. Try to remember colors, diagonals, corresponding squares.. It will be hard, no fun and will take time and might not pay you immidiately. Or put a single knight and try to see where can go and how much time/moves it will requiare. Chess mentor has fantastic , very importhant lessons for beginners who will boost you very quickly including visualization exercises. And there is 2 part video from Danny about achieving full board vision at video section.