Share analysis

A question for all of you old-timers here.

In addition to my $500 (+0,86 %) ETF in the future to deal more with individual stocks.

My question is this:

How would you guys best inform yourselves in the topic of stock analysis/stock valuation.

For example, are there any programs or YouTube channels or other sources that you can recommend for getting started? Maybe even a book :)

I've already searched a bit on Google, but I'd like to hear a few more recommendations from people like you who have been doing this for a while.

Thanks in advance :)