Hi Nanlee and welcome to Ukraine forum :)
Many thanks for your willingness to share your experience! Glad you had a very good one :)
But unfortunately forums are not the places to write reviews. If you are not an owner, but want to review a tour that is not listed on TA, you can submit it to be listed on TA by filling in the form here www.tripadvisor.com/ListingRequest… It will just take a few minutes.
For "Type of attraction", please, choose «Walking Tours» in the drop-down menu. Add as many details as you can in «Please add any additional information that may help us find/add this listing» box.
TA will verify this information and if the listing is approved, you will receive and e-mail «We are ready for your review!». Note that it might take several days.
You may also want to check «Things to do in Odessa» yourself, to see if it was accepted or not. Sometimes e-mail comes later than the listing appears.
Thank you very much in advance if you decide to invest couple of your minutes into doing this! It will be very helpful, indeed.