First, it depends upon what type of photography you're doing. If it's wedding photography, you're going to being going after a different set of clients then if it's architectural photography or real estate photography or portraits.
Second, you're Ukrainian. So I'd start there. You've got a significant ex-pat community of Ukrainians in the US. Reach out to churches, other groups that Ukrainian ex-pats are going to congregate at. Find the local restaurants and make sure your business card is available. Do you have any kids in HS (or friends who have kids in HS)? If so, then shoot some pretend "graduation portraits" (which is a growing market) so that is up and displayed before you get to the end of the school year (and seniors are looking for portrait photographers). Likewise, you shoot boudoir photos? Get a portfolio before you get to Valentine's Day.
Third, when you're starting out, it's tempting to say any business is good business. But that's not true for photographers. Let's say you get hired by an Animal Shelter to shoot photos of dogs and cats (to put on their website). They might be lovely photos and you get a great referral. But people won't look at those pictures and say "I'll be he/she would be great to shoot our wedding." So identify the niche you're going for. Than even if you have to initially stage it (I know a wedding photographer who shot a mock wedding in order to get photos for her portfolio), you have stuff that says "I shoot this!"
Good luck.
