How much space do you need? If it’s just a little you may only need to get an aftermarket seat with more relief or get someone to shave the foam down on the existing one. That’s the cheapest, easiest, safest and least complicated route to go by far. Avoid lowering links if you can. If you can’t, buy an engineered solution for your specific bike. You generally don’t have to mess with the front end at all but it will affect overall handling so just don’t go too extreme. I have redone suspension on a couple of bikes only to return them back to stock in the end. If you can get away with just a new seat or a trip to the upholstery shop with the one you have then you have no worries at all.