The thing is, it depends on what exactly you want to improve (for example: fillers don't address dull or uneven skin tone, they simply give more volume to the face, whereas most skincare wont increase facial volume, but will brighten and even out skin tone). Every product or device is usually to address a specific issue so maybe focus on two or three things you want to improve.
I would say start with a daily routine that is simple and that you will stick to. and then you could build on that with in office procedures (if you want).
A basic routine I would recommend is:
Morning
Vitamin C serum (brightens and evens skin tone)
Moisturiser
Sunscreen (protects against UV damage)
Evening
Gentle cleanser
A retinol product (over time can increase collagen production and cellular turnover)
Moisturiser
It's important to be realistic about what at home devices can do, and also how much time and consistency you are willing/able to invest in them.
I bought a Nuface device which I didn't like, but some people rave about them. To be fair I found it a faff to use, and stopped bothering with it after a while so no idea if it would give better results with consistent use.
I have invested in an LED facemask, but only got it recently so it's too early to tell if it makes much of a difference. However my expectations are low enough, I'm hoping for mild to moderate difference rather than significant.
But I guess every little helps!