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?
Buy Bitcoin on weekly or monthly basis, don't trust in Altcoin, Altcoin has no future, You can buy Bitcoin weekly basis at the weekend dump. It is sure that Bitcoin will surpass 100K this year or within the next two years, But there is no guaranty for altcoin, Altcoin market is a shitty and creepy market, Most of the altcoins are getting crushed when Bitcoin dumping, but few of them are able to recover.