How much is a reasonable monthly profit?

I am new to all the crypto trading thing but it really is fascinating to me. I have recently started reading some books about cryptocurrency, technical analysis etc.in order to get familiar with the basics.

I know that I won’t make millions because this isn’t my goal. My goal is to make a small monthly profit (about 50$). I plan to invest every month about 20$. My time schedule is kinda short since i am a med student. I was thinking about a plan of weekly or biweekly swing trading since I won’t be able to sit in front of a computer all the time to catch the best prices. Can anybody with experience tell me if my plan sounds reasonable? Also if it is reasonable, how long do you think it will take in order to reach these profit levels?

I know that at first i will most probably lose some money due to bad judgement but i want to make an investing plan (since all the books advise to make one). And in order to make such plan i need to know if my goal is reasonable.

Thank you for answering and fo helping out a novice trader!