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CoinGecko Terminal is pretty good for that:

https://www.geckoterminal.com/

I use it a lot. You can create your own watchlists, draw lines on charts, etc. Once you are more experienced, I'd suggest checking out Trading View although their free plan is quite limited.

Trading View
This is what I heard a friend talk about. But like you said, I'd do the baby steps by starting with https://www.geckoterminal.com/