My very small company does not offer HSA or FSA. Is it possible for me to participate in a HSA/FSA as an individual? How would I go about it? Thanks!

Any individual can open an HSA account. You purchase an HSA qualified individual medical plan and open an HSA account to go along with it. If your employer is already contributing to someone else's individual hsa account, you may also be eligible for matching contributions. As for the FSA, sorry, your out-of-luck, unless you are a dep on someone who has access to one.