I think it's reckless to try and run a routing node on raspberry pi especially when you're unsure of exactly what you're doing.

Not so reckless to run a node, open some channels for personal use and either have them unannounced or set the max htlc to 0. That way you won't route and you can still spend and receive without a big risk of unwanted force closures while retaining full custody and control of your funds.

It's all about determining the reason --WHY-- you're running a lightning node and setting things up that work toward your reason.