Thanks for that Hoax. I wasn't aware that there is a different and perhaps better way to do noun-declensions. However currently my table is the only way I understand how to make Russian noun-declensions.

My intention is to complete the table and then memorize it. It's a lot to memorize, but this should do the trick right?

One issue I've already run into is that the endings -ya and -iya can be confused with each other. For example take the name Maria, in Russian it's spelled Mariya. You'd then think that the ending is -iya right? But I've been told it isn't -iya, but just -ya. Which means that the name Mariya follows the declination pattern of -ya and not -iya. That can be confusing.

Nonetheless this table is the only way I currently understand to make Russian noun-declensions and for that reason I'd like to complete/finish the list.
The first step would be to find out which endings go in the two missing spots which are marked in light-blue. A second step would be to finish the -yo row and find out to which declension-type and gender it belongs. A third step would be to add missing endings, split consonant endings and check for errors in the table.