Yes, that's my idea. I wanted to start with Sidemount and Intro to tech and then to see how I am doing. Of course, if I see that my skills are not up to standard I will not be overpushing limits and will defer other courses. Issu with GUE courses is that not many agencies offer them and it is not easy to match that courses with my vacation.
For GUE courses, you usually contact instructors first, and try to arrange dates and location with them. Most of the GUE courses are arranged this way. If you want to arrange a GUE course to match your vacation, contact instructors who are active in a suitable location. Many of them travel worldwide, as do their students. GUE courses are offered only by GUE instructors. You won't have luck browsing the web and trying to find a GUE course at your preferred date, but you can have it organized for you.
Intro to tech and GUE Fundamentals are overlapping. GUE Fundies is a great course and required for further GUE courses but it really doesn't make sense to take both. If you decide to dive only sidemount, whole plan will change. That is one option. But if you really plan getting tech training in Hogarthian BM doubles, I would postpone sidemount until you are first really comfortable in BM. Or learn sidemount and go tech in that configuration, but that is something I didn't choose. In that case GUE doesn't really make sense.