Hi to you, I find the best way for learners to acquire the English pronoun system is to do good old-fashioned gap fill exercises. Essentially, there's no miracle fix here. They are like learning a formula so they just need to be learnt and memorised through written and spoken practice. Here's a good link for you to try out with a useful pronoun chart. https://www.grammarbank.com/pronouns-exercises.html Hope this helps!

which pronouns do you want to learn ? you can add me and I'll do my best to help you.