I would be concerned about the shelf life of MCT oil. I don’t know about the shelf life of the ingredients used for gels, if they can live for longer then that would be better.
Lena from https://groups.io/g/MTFHRT (the site uses outdated terminology though) also talks about eating micronized powder (might cost more, idk, but I think since no other ingredients are involved this should be good for more years).
The site also has info on making gel and injections, but the guide for the latter is rather unhygienic.
Don’t forget the gels, they are applied to the skin, easier than measuring out an appropriate amount of powder.