HODL has become inherent among investors, for HODL is the power to keep adding to bitcoin holdings.
I still find it difficult to understand the graph here
https://hodl.camp I am more another DCA calculation calculator as mentioned above, even so, I always record every bitcoin purchase on Coinmarketcap so that I know the average price purchased and the ROI I get now, so this is not too much of a headache for me.

Yeah it's better to not get into all this technical staffs unless you really want to learn it. HODL should be simple. Just keep on accumulating and forget about them unless you have an emergency and you need the money at once. Don't ever check Bitcoin price on a regular basis. That creates a FOMO and people usually fall for it.
Bitcoin is like bluechip stocks. The longer it stays in your account, the better return it gives. You can use any simple portfolio apps simi6to the CMC one. Keep it simple!;