What is an average / good speed for leveling up?

I can understand that. One option that might work for you is the mobile app. I use flaming durtles.

I find it very useful when on the go or when not in front of my computer. It is Android only though. It has a lot of the more useful scripts built in. I know there is an app for iOS

but I haven’t used it before so I don’t know what features it has. I hope this will be helpful to you.