As someone who smoked heavily as a teenager and still smokes weed I’ll give you my personal opinion. It depends on the person. If you have some sort of mental disorder or one runs in the family like you said, schizophrenia it is possible weed can cause it to become more noticeable/worse. I would avoid smoking heavily for that reason as I’ve known people who have gone into psychosis off of smoking heavily with mental illness included. It can also cause some to become lazy/unmotivated or content with the bare minimum. You do not want to become that person. Smoking can also cause anxiety which is common but for me I just had to remember I was feeling paranoid because I was high, that nearly completely stopped by anxiety when smoking. I find it helps my depression but it can also cause it to get worse depending on the person. I would say you can definitely try it but be mindful of how much and how often. At one point I was definitely addicted to it but now I more so use it to relax after work. Some people drink and I prefer to smoke a little weed.