I would suggest to start gradually and with "modularity" in mind. The most useful piece of latex clothes is briefs/panties. Add sheath according to your "taste". No sheaths is quite fetishy too. Transparent latex is a fetish on its own. But opaque briefs/trunks can easily be used in public, for example, in swimming pools.
I'm not attracted to bras, but you can buy one next.
One-piece latex swimsuits is also a separate fetish, and you can easily wear it underneath you clothes (if you want 😉
If you still like latex, the next step will opera-length gloves, stockings and garter belt. At this point you will have a full lingerie set.
If you move into "the self-bondage direction", then a fully closed latex hood (will a built-in gag) is a must. To make it "more playable" a closed hood with a mouth opening is a very good and "flexible addition - you can use it with a partner or with a gag of your choice.
I would stay away from inflatable latex (unless it's an inflatable gag) and built-in plugs/dildos, because they are always glued in the wrong places 😁 Built-in gags fit "better', though designed wrongly (see
https://www.likera.com/blog/wp/archives/10695).
Catsuits are very erotic, but getting one that would nicely fit you is both very difficult and very expensive.
Also, keep in mind that latex does degrade and decay.
Enjoy 😋