Where should i buy jewelleries/makeup/dresses(plus size if possible)/gadgets in thailand any suggestions? and how to look out for workshops or cafes?

Hi me again
Even though i will be travelling with family so no clubs or disco
shopping it is how do i get the best rates and where do i find cheap but good products male/female jewelleries and accessories/makeup/snacks to bring back home (), i saw workshops in youtube, how do i contact them and how do ik about them?
How do ik about night markets or food related markets and what should i look out for.
thanks in advance love you all