Plan 1: Buy BTC and ETH only. Spend $50 and buy 50% BTC and 50% ETH. No schedule and buy on dips.
Plan 2: Buy BTC, ETH, and LTC. Weekly, regardless of the current cost of each coin. Alternate between coins so 1 week buy 50/50 BTC and ETH. Next week buy 100% LTC. Next week buys 50/50 again.
HODL both obviously.
Also at what point is a hardware wallet required?
I think weekly investment would be the best if you have spare money to do it.
Consider it as saving in a piggy bank but we all know that it is way better than it.
I would also do it once I had settled everything that needs to be settled but I plan on focusing with BTC only .