Are investment newsletters actually worth reading

Ok so looking to start getting more active in the market and just like with all targeted ads ALL my socials are now inundated with ads about trading newsletters, or the add that say things like “we called this stack weeks ago” when it’s spikes. Are any of them worth reading. If they aren’t worth reading what is worth reading to try and grow and diversify

I have a very small portfolio that I got in an inheritance and I’d like to grow it as much as possible just don’t know where to start.