Don't get me wrong... it's necessary to put people on ranges at some point, but I think you need to work on the even more basic stuff like pot odds and how they relate to your bet sizing.
And not even that... you can just go by standard bet-sizing without having to understand why you do it. Like raising 4xbb +1 per limper and c-betting 3/4 of the pot when you either hit, or the board is dry... it's not always correct, but more likely to be correct than what you are doing now.

I'll also take the freedom to assume that you are neither rolled nor can you beat £40NL. If loosing £1000+ while you're learning won't affect you personally then go ahead, but it would be more wise in my opinion to start your BR from the lowest possible level so you make your mistakes at stakes where it doesn't really matter, and you won't have to dig yourself out of the hole once you manage to beat the game.