- lookup how to make a secure paper wallet

- download instructions and software to create it on your pc

- turn off internet

- close the blinds

- generate wallet

- save as pdf, encrypt, memorize, and backup somewhere safe

- on phone install an open source, highly respected bitcoin wallet that respects your freedom

- add your paper wallet to your mobile wallet

- go to a satoshi meetup, OTC BTC exchange, ATM machine

- trade cash for BTC, have them sent to you paper wallet

- verify transaction

there is more to do to get good, but this is a start