It's very simple. If you are new to trading crypto, these are the most common mistakes.

Don't short - ever.
Don't use margin lending - ever.
Buy cheap and HODL
Stop overtrading or trying to scalp. Those small commissions add up quickly.

Just buy and hold quality coins with solid fundamentals. You are not a charting wizard or a soothsayer! It's a big wave we are riding right now, no need to keep changing course.