As a last resort ( if you are still not sure of climb performance ) when you fly in conduct a go around from say 500’ above airport elevation with an escape route in mind and see how she performs at 70 knots......if it doesn’t go very well and you are not confident divert home and don’t land?
as Cessna200 says above you could do this before leaving your local area. Setup for takeoff config at 5,000’ and fly level at about 60 knots, then apply full power and see how it accelerates and climbs at 70 knots.......should give you a good idea show she performs at 5,000’
Very sensible question you ask and I’m sure you’ll be fine after some research.