what indicators should i use to trend following and what indicators are best to spot reversal
To get started with Technical Analysis would suggest you to read Varsity. You will also get insights on some commonly used indicators.
there are many indicators which you can use to determine the trend but you will have to learn how one works. everyone will tell you use this or use that but you will only really know how to use them if you know how they work. I think Varsity as suggested by @ShubhS9 is good starting point … once you know the basics of technical analysis it will help you learning more further.