Great work, especially for your first detail. One thing I noticed is that you have 3 sealants that you used, did you use them on different parts of the car or layer them? If you layered them I would recommend not using the NXT because it's a cleaner wax, so it will remove any other wax or sealant that you put on before it. If you're doing a one step polish you might also want to try something less aggresive like Menzerna
Power Finish or
106fa. Those polishes with a
Green Polishing Pad will leave an even better looking finish than just using SIP alone.