The internet has a wealth of information to learn about crypto, however it can get overwhelming with lots and lots of YouTubers coming up clamming to know the next 100X coin or block chain technology gurus. So you need to make your choices very very carefully.
The best person to learn about blockchain technology in lot of depth and clarity is Andreas Antonopoulos, hes just excellent.
To get a idea about the market/exchanges/past performances go to
www.coinmarketcap.com.
If you want to get details about active/upcoming ICO's go to
www.icodrops.com. This site lists only the legitimate ICO's.
If your looking for good ICO reviewers you could check out Ian Balina/OH Hey Matty/ Crush Crypto. Some of them do have a reputation for shilling but who are we to judge. They do know what they are talking about!
Do get a idea about what is happening in the markets in general youtubers like Data Dash, Boxmining, Sunny Decree( Love the guy) and Crypto Daily are noteworthy.
To read about market updates and latest news on crypto coin telegraph is a really good source.
Lastly not the least if you are interested in trading please up your trading skills by learning Technical Analysis, which I am sure is easily accessible through YouTube.
Hope that helps!