I'm willing to invest into crytocurrencies but not sure how to start ones I'm ready to dive in. Shall I go through Bittrex, Coinbase or find a legit seller here in BTCtalk? What would be your advise?
Coinbase and Localbitcoins are best choice for the people who want to invest and buy the coins. I am not sure without crypto coins you cannot go to bitrex to buy it moreover they would not allow people to sign up all the time.
If you are Europe you can go to Coinbase to buy, Asian countries not more supportive to buy bro. Once after you bought the coins do not keep that fund on trading site itself. Keep it safe on Segwit wallet like electrum for your safety.