i had similiar question with how to invest money and never really got anywhere with it unfortunately,
pay for services from sellers such as
netflix / spotify / pornhub etc
buy 10 account $2-4each - for arguments sake etc
sell to friends and family $5-10 each
low value but it all adds up over time especially when the word starts spreading,
do some flipping if possible for your region such as fitbits / refunders etc can make big money sooner