Something like this maybe?

https://www.amazon.com/dp/B08JGKYM7R?pd_rd_i=B083NG3DZZ&pd_rd_w=YvAaN&pf_rd_p=3465d0d7-4e28-4692-b633-326c458deaa4&pd_rd_wg=Ygf8j&pf_rd_r=F0930B4JEYQ6ZT9PB5AY&pd_rd_r=80196cbb-5efc-4615-8d25-21aaedc9c7c5&th=1

I'm not in Europe but I'd also try searching for yoga pants or joggers that have a drawstring waist so you can tighten them. If you don't want to take your bottoms to a tailor or dressmaker and have them altered a drawstring is very helpful.

Can you cut off a pair of tights to wear under the dress?

You can also wear mini dresses as tops. Skater style dresses have the fulness you need.

Something like this you could belt at your narrowest part which is probably your waist

https://i5.walmartimages.com/asr/8d21b5b8-4920-433f-a142-6d208784df77_1.d8461f8fa14bb839d5823d29beb941d1.jpeg?odnHeight=450&odnWidth=450&odnBg=ffffff

or

https://www.asos.com/us/asos-petite/asos-design-petite-mini-skater-dress-in-pink-green-plaid/prd/22318025?colourwayid=60389567&SearchQuery=skater+dress

https://www.asos.com/us/new-look/new-look-short-sleeve-ruffle-poplin-mini-dress-in-white/prd/23107853?colourwayid=60451673&SearchQuery=skater+dress

https://www.asos.com/us/asos-design/asos-design-shirred-mini-skater-sundress-with-scoop-back-in-khaki/prd/20093264?colourwayid=60008006&SearchQuery=mini+skater+dress

https://www.asos.com/us/missguided/missguided-pleated-skater-dress-in-blue/prd/22976322?colourwayid=60441281&SearchQuery=mini+skater+dress

https://www.asos.com/us/closet-london/closet-mini-skater-dress-in-navy/prd/14895085?colourwayid=16652750&SearchQuery=mini+skater+dress

Rather than booties I'd probably look for a high loafer or something that laces up.