1- there is no need to overthink landscaping, but do some brainstorming beforehand. figure out what kinds flowers, bushes, trees, and pwps work best with your paths. don't be too strict with your vision though, sometimes certain things work out in unexpected ways. however, if there is a specific pwp that you want in a specific place but haven't unlocked it yet, then try to save the space for it
1.5- one thing to keep in mind when choosing paths though: make sure that they all go well together. your paths don't need to all come from the same creator (I like to mix and match) but try to choose colors that work well together and styles that flow as well. for example, with one town I chose paths were grassy and cute but "realistic" while my other has paths that are bright and cartoony. you said you picked peachy paths, so make sure that the other QRs you got work well with them
2- don't be afraid to mix different flower colors and even different flower types. fields of identical flowers can look nice, but adding in some mixture can make up for interesting gardens:
3- use every resource that's available to you, not just bushes, flowers, and trees but also: bamboo, bamboo stumps (various stages), tree stumps (various stages also), clovers, mushrooms, even rotten perfect trees, and even trash can be beneficial to the overall look of your town if think of a good way to incorporate them!
3.5- mixing in different elements will also add more texture to your town/make things more interesting. and of course don't forget to mix in PWPs with your natural elements
4- don't be frustrated by rocks or villager houses that you cannot move or destroy, instead to plan out your town in such a way that those rocks/unwanted houses work to your advantage
5- sometimes less is more. other times you need to go bigger. figure out what works best for each particular situation (I have some trees planted in those empty spaces on the 2nd pic, but the angle of the picture hid them)
6- most importantly, and this is going to override everything I've said: do what
you like best. at the end of the day the person loading up your town every day will be you and nobody else. if somebody dislikes something that you love whatever! keep doing what makes
you happy! again these are just things that I like and pictures of my towns, so don't feel forced to abide by these tips if you don't agree with them