Plan 1: Buy BTC and ETH only. Spend $50 and buy 50% BTC and 50% ETH. No schedule and buy on dips.
Will you do this constantly ? i mean each time ? or just a one time plan? small amount each week will help you invested bigger in long run.
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.
This is One good decision , Buy each time and these 3 main coin is the perfect choice mate.
HODL both obviously.
Also at what point is a hardware wallet required?
The very Moment you decide and learn the word HODL , That is also the best time to require yourself to use hardware wallet.
Not your key , Not your Coin..