Ultra Freshie

Been a console player my whole life (25) finally picked up a pc few months ago and picked this game up a during black Friday. Absolutely in love with this game, the interactions with people and the survival aspect have made me become addicted. One big problem, I'm new to keyboard and mouse, no problem aiming on a controller but still trying to get used to this, having no problems getting loot and making my way deep in land but I am Absolutely dog shit at aiming or anything to do with fire fights, I'm sure I will get better as I play more keyboard and mouse but does anyone have any tips on servers to play to get better at shooting or really any tips on learning keyboard and mouse.