Don't TA plays an important role in economics, You don't really need TA to be a trader in Crypto. Everyday people post hundreds of TA charts saying Bitcoin will increase 50K or come down to 5K. Everything is just a speculation. Finally markets will play its own game.

To OP, You can give Bitcoin trading a start by using demo trading feature in most of the changes before putting in real money. Grasp the basics, Buy low-sell high and repeat. Now how to choose coins to trade depends on your knowledge about those coins and how they are performing currently. You can check this forum or reddit or youtube to get some insights. Make a list of promising coins and start with them. Don't put all your money and then whine about losing it. Trading is an art and not everyone is an artist. Try to become one.