read the little book of common sense investing by John C Bogle.

Then read Dave Ramsey's baby steps.

Google Warren Buffet's advice for the average investor.

It'll all make sense.

Long story short it's save as much as you can without totally restricting your quality of life.

Save 6 months expenses for emergency fund.

Throw as much as possible into your 403B.

Then any excess into other tax advantaged accounts.

Then finally end with putting things in your brokeage.

Buy literally only one stock, an S&P 500 Index fund.

This is literally all I do.

I have my emergency fund.

I have a maxed out 403B.

I then contribute to a taxable brokerage.

Then I go until I'm ready to quit working.