Request for an investment platform for Ukrainian

Good day!
After a long search and research, I decided to ask you guys.
Would you kindly give me an advice for a long-term investment brokerage platform.
Complexity is in next features:

  • I’m Ukrainian, so, US platforms like Vanguard and Betterment are closed for me, as well as well known and easy searchable European one. It’s hard to find something reliable, which allows to use it with my citizenship.
  • I’d like to use small amount of sum each month, approximately, 100-150 usd. (So, IB as also not my choice)
    I’m interested in low cost index funds and ETFs.
    Is there a suitable and reliable options?
    Wish you a great day and thanks in advance for advise.