It all depends on your current needs and how you’re evaluating your pronunciation at the moment.
If you have some basic understanding of phonetics, and would like to only fill in / refresh some moments;
or you’d like to go through some examples and practise along with Tetiana;
or to get access to such information and practical exercises on a video;
or you would like to see how it is to work with Tetiana (before you make a decision about her 10-week pronunciation course)
workshops will be quite enough! Workshops are a selection of the most difficult sounds and themes, and an intensive practice with them. Participation in a live workshop will give you an opportunity to receive Tetiana’s feedback on your pronunciation.
If you have a need to dig deeper and to start working on your pronunciation in a more profound way and on a longer time scale;
to structure your fundamental sounds and phonetics knowledge, understanding of intonation and connected speech;
to try shadowing technique;
to improve your own pronunciation.
Then of course it’s worth choosing the course - it’s much more profound, contains more practical examples and regular personal feedback from Tetiana. Tetiana’s pronunciation course duration will allow you to create and fix your new improved pronunciation habits in your English.
Ideally - it’s worth trying to work with Tetiana at the workshops, in order to understand how you will keep on working during the course, and what kind of materials you should exect.