@alexander Glad to see you doing well. I feel there are times to do momentum investing and times to follow the value approach. The current rally looks good for momentum investing.
Regarding stock selection, as you rightly pointed out, I preferred to avoid adani group shares because of my personal bias. (and missed a few big winners in the process 
but I am okay with that)
Your position sizing is okay. Keep a part of your portfolio for momentum strategy and once you are comfortable with the process and develop an appropriate temperament for it, you can increase total allocation to momentum portfolio according to your comfort levels.
The important thing to do is to plan the trade in advance. So the effort needs to be done before market opens up. During market hours, we tend to get swayed with movements in stock prices. So better to plan in advance and execute if necessary conditions are met.
I usually prefer short to medium and often long term trades and hence look at weekly or monthly charts and take a call. So I am not too much influenced with daily or intraday movements of stock prices. Plus I always try to look at fundamentals and if I find anything discomforting, I avoid that pick.
Regarding buying stocks you don’t know much about, better avoid buying them. Or if that’s not possible, then keep the allocation low so that the trade does not hurt you.