I would strongly, STRONGLY advise you to email the recruiter and say that after getting some more info about the process, you would like to please postpone the interview.

Get yourself onto http://leetcode.com Start practicing. Aim for three questions per day. Work on it for one hour, if you can’t get it, look at the solution in discuss tab and then understand it and rewrite it.

Don’t waste your time taking any FAANG tier company interviews until you can do a medium difficulty question in 20 minutes.

Once you feel ready, sign up for the 10 mock interview package on http://interviewing.io and apply for the cost deferral program (you don’t pay until you get a job).

Also read on http://teamblind.com

As other posters have said, the alternative is to go for very very old tech and find a job doing cobol or something for a bank.

On salaries: are you aware of the current pay scales?

If you can work on leetcode.com for 2-4 months and get your skills up, you should be able to land a “senior software engineer” position. This pays around $300-400k at FAANG.

Look at the total compensation on http://levels.fyi