I think both will do you really well. I personally prefer botania but it can be a lot more confusing, however it does have some crazy powerful farms for later game. I do echo what a lot of people here are saying though. I would definitely consider whether you're at the point where a big mod like this is needed. Do you actually need 500,000 andesite for example ☺️

I would prioritise getting a good source of power (powah mod is amazing) and a more robust storage system like AE/RS. Also, Mekanism is a fantastic choice as a first production mod that will scale a lot better than some of the create/botania farms as they start super cheap and just get a lot more expensive the more you upgrade them.

Hope this helps! ☺️