any tips on how to park perpendicularly while maintaining balance? i find it hard to do so, does this need any modifications on my car? my kids dislike perpendicular parking and they get all nausea but i'm trying my best not to freak them out, any suggestions will be open, thank you.

you could make sure there are no items that weigh your car to one specific side and only put them in the front.

Same

Imma use a spirit level to check the angles