Hi developers and pro engineers , i am new here on reddit but now i am working for a company using java , native C , sql , etc for backend problems for about 5 years now

but now i've also interested in having sidehustle to create web for people as well , i am very interested in NextJS , so i've created some web using NextJS and ExpressJS for my fullstack development

here is some web that i've created
https://portofolio.kikisitestudio.xyz/

tell me any feedback is appreciated , i still have no idea how to promote and sell them as well
thankyou very much !