Do not stop and do not be afraid of failures
So that you have a real choice, send out 30-50 responses per day. A normal response is 1-2 interview invitations from 100 resumes sent. This does not mean that something is wrong with you, just such a market now, high competition.
Also don’t be afraid of failures. Consider each interview as an experience, always do “work on the mistakes” and carefully prepare for the next interview.
Do not give up side jobs
Especially if there is no money in reserve at all and a job search is extremely relevant. If knowledge allows, then freelance is the most common way to make money. The main thing is to know and not to fall into schemes of deception in the labor market.