My advice, try to watch some explanation about crypto in general, not only bitcoin. Bitcoin of course is good, but there's also plenty altcoin that pretty good too. If you want to invest, make sure you already prepare to lose. Also, read some article or news about crypto. I usually use Tradingview, but you can use anything that you want as long as it trusted.
For someone totally new to this cryptocurrency space, I will say it is very bad idea or advice as you say to look into Altcoins. OP is looking at getting into bitcoin for investment purposes there is currently no altcoin that stands out as an investment asset. My advice is for OP to stick around bitcoin and bitcoin only. Altcoins are gambles no matter how they paint it. I am not disputing the putting money into it but not for newbie like OP.
As for resources to read, OP doesn’t need TradingView which is a tool or platform for drawing Charts, it is mostly used by traders which OP currently isn’t and shouldn’t consider going into (at least at the moment)