Thinking about getting a new amp and/or recording device within the next year as I would like to start recording myself playing.

I really like the Boss Katana amps with USB connectivity. However, I read some folks discuss recording through their Focusrite Scarlett.

It's all Greek to me and so I come here asking for explanations in layman's terms. I have some amps already. If I use the Focusrite to record off my current amps, does that mean the amp has to have a direct out or line out?

Which is better for recording while I play.....going thru the Katana or the Focusrite. Is one way better than the other?

Feeling dazed and confused. Thanks in advance for any help you all can give.