First timer!

Causal baker here!
I used @sometimesimakecookies recipe on TikTok where she used 1.2x the amount of powdered sugar and almond flour to egg whites and granulated sugar.

Was terrified to make macarons for a long time but I think it’s not too bad for the first attempt? They are slightly hollow and could have better feet but taste decent.
Initially filled w just raspberry jam but found them too sweet so made lemon buttercream as the border filling. Any tips to balance out the flavors and fix the hollowing? Thanks!