Chart work can be as complicated or as simple as you want to make it. Personally I've done multiple courses in chart work including the use of indicators. There are a multitude of opinions on what works but you really need to come back to your own use case and intention.
Intention - what's your specific need for understanding how a chart works? Do you want to day trade, short term trade, long term trade, invest or use it as another tool...
Personally - I now do my own chart analysis which is very simple and a blend of different courses I've done. I don't use any indicators apart from having the 21, 50 and 200 moving averages running and volume. From here I draw my own flags or pennants to see the consolidation and breakouts which lead onto recognizing impulse, correction, impulse.
I use https://www.tradingview.com/ - What I do is now very simple and happy to show people on a zoom call