Yep, personally I’d do an oil change considering it’s now over a year old and has more than likely never properly warmed up.
Other than that just drive the thing. As far as the exhaust and back pressure is concerned, someone on here has a comment in their sig along the lines of ‘back pressure is a fallacy, do you fart any better with a cork up your arse?’
Look, don’t overthink it, just use common sense - take it easy for the first thousand kms or so, (the odd bit of full throttle acceleration won’t hurt after a few hundred), then just drive it and and enjoy it. You don’t need to follow a formal running in procedure like older cars needed.