@caramelchaos
Niacinamide is a dream for spot prone, sensitive skin and I find it helps make my skin look more radiant.
Retinol - there's been a recent study that showed super strength retinol is no more effective than a low strength solution. In fact, the industry is beginning to move away from retinol in favour of less irritating, more gentle exfoliants. Eg bakuchiol.
For starting retinol, just go with something basic, a low strength solution. Start using 1x a week and build up. Always use spf.
Vitamin c serum is really good for skin tone and brightening. It can be a bit irritating when you start so maybe apply every other day to begin with.
A hyaluronic acid based moisturiser is essential (or a hyaluronic acid serum) and again spf.
Look into face gym / face yoga for toning.
A translucent powder helps stop make up sliding, you don't need to apply it all over just where needed. You might find an eyebrow wax/pomade/liquid more effective than a pencil. You can also get home dye kits for eye brow tinting. Stencils will help you get a good shape, alternatively have a good Google there's loads of advice or specialists who can do the shaping for you.
Review the colours you're using in makeup, it might be a new palette for foundation, blusher and eyeliner etc makes a big difference in lifting you face.
A refreshed hair style and colour can also help.