currently i am doing Bs in Psychology and i don't know what to do but want to earn for myself

You post may call for some clarification… are you asking how to improve your grade in Psyc classes or how to utilize your current education to make a living?

Here are a couple thoughts for each:

1. ask your professor/educator for help by scheduling time for office hours with them. Make sure to be clear with your intentions and bring specific cases or study work you’re wanting to improve.
2. get together with a study group and facilitate a meeting that allows everyone with questions to discuss what/where they need help. If others in the group have answers, everyone learns together. If others received answers during office hours with the educator (you can also go in pairs if you have the same questions of the professor) you can relay the learning you had.
3. be proactive with your classes and study group. You aren’t likely the only one in class with questions!

If you’re looking to earn an income during your studies, it may be hard to do in your field without the credentials after graduation. But maybe look into some intern work, teacher’s aid work, or volunteer work. While pay may be nominal or zero (for volunteering), it’ll give you an opportunity to network and get information about what scope of the industry you are headed into. Do you wish to work with children, young adults or adults… are you looking to work in treatment and hospitals… private practice… group homes and recovery, veterans and ptsd, addiction specialties, etc.? At some point, you’ll need to spend intern hours in your specific fieldwork and be able to gain experience with senior psychology and psychiatry staff after graduation. But I’d say build a network and even ask your professor/educator to offer advice. Good luck… it’s a tough job and also rewarding. And I’m coming from the pov as a patient. So, keep going and find the work that your passion to help shows you.