Fiesta Lower!?

Hello, I’m new here in the forum, so far I’ve dealt more with acoustic than mechanical tuning. But I’ve now thought about bringing my Fiesta GFJ a little closer to the strut. Had thought about 30 to max. 40mm. Is this already very strong on the standard shock absorbers at this height or can I leave them in without problems and even longer life?? How is this (experience values) with mounting on smaller ground waves, lowered curbs and dirt roads, makes sic h that is already very strong noticeable? I am primarily interested in better driving idiosyncrasies, i.e. a better road position and only in the second place about the optics. Which companies can you buy in a good middle price class with a good conscience? Where are the differences between the individual manufacturers at all? Sorry, are many questions, but as I said, am new in the topic and would like to inform me before I screw around something better enough… Thank you already, for your A answer. y.s. cellogs