Buy at a local comic shop, Phoenix, Another Dimension or Words and Pictures should all have what you need. Or on amazon.
Boxes like these:
https://www.amazon.ca/BCW-Long-Comic...7PFXCM75DS7SAR
Plus bags and boards. Assuming your comics are all modern era just regular bags/boards will be fine. If you have Golden/silver age stuff you may need other sizes.
Store in a cool dark place. If you want other options, like for display in your home, you can find stuff on amazon or in your local comic shop.
Also, there’s a dedicated comic book thread in the entertainment sub forum where you can ask more questions or discuss collecting further.
https://forum.calgarypuck.com/showthread.php?t=143504&