Thanks to everyone who was able to help me. Thanks to you, I bought the necessary syringe for feeding and baby food. It also takes a lot of cotton swabs, disks and toilet paper.
when I found him, he was covered in little parasites and after each feeding I clean him and his place where he sleeps. (and he also began to go to the toilet better)
I feed him every two hours and I have to work at the same time.
I want to sleep all the time, but I'm glad that this little bundle feels better.

you can read his story and help this little creature here
https://www.furaffinity.net/journal/11208410/