Play intermediate bots, test your limits on the champ, see how much you can trade, when you should stop, how to focus your cs etc. I know even the intermediate bots are easy to deal with, maybe try the training and put yourself up against 3 bots with no allies etc. Unfortunately, you’re bound to find people who already know how to play the game, who created new accounts just to “stomp” on new players. Makes their little peepee grow, but you have to try and take every loss as an opportunity to improve, see how they played, how they reacted, how you could have done better etc. It will get better with time.