Visit https://metamask.io/download, then install. You can also download on the mobile app stores. Be sure to keep your seed phrase in a secure location and never give this out to anyone.
Download the Altbase App from either Google Play, or the App Store.
When the app has finished downloading, follow the onscreen instructions within Altbase app to create a new account, and then create or import a wallet.
Take note of the recovery phase if generating a new wallet. Do not share this with anyone and store it securely.
With the wallet created and Altbase set up, next is to buy BNB as this is what is required to buy $MMA.
Select the Buy button on the Home menu, inside the BNB Section.
Follow the onscreen payment instructions via Simplex payment platform, including adding card details and ID&V as necessary.
Once the BNB is successfully added to the Altbase wallet, select the Coins section, find MMA Coin and select.
Inside the MMA Coin sub-menu, locate the green buy button to open the buy screen.
Inside the MMA Coin ($MMA) Buy Menu, choose the amount of BNB to trade for $MMA and to complete the transaction, select the buy button on the bottom of the screen to buy $MMA.
Your Altbase wallet should now reflect your buy, and show your new $MMA balance.