Hey and welcome!!!
Long time user as an athlete and coach here.
Once you subscribe you can request to be part of the Time constraints Beta Group and you can tell Athletica how much time and which sport you want to do on certain day. As it is a beta group and not yet 100% perfect, please allow some slack. 
I would definitely use triathlon plan as it sounds like you enjoy doing multiple sports for your adventures!
Training philosophy is super important! Athletica is a brilliant way to keep doing what you love to do (endurance sports) without getting constantly injured, burned out or overtrained. There is a lot of easy training as in zone 2 (and your zones gets automatically adjusted once you do your initial test week, or every time you engage yourself in harder effort above threshold for a certain time interval), functional strength work as in strength endurance - hill simulations, threshold, tempo and of course VO2max work (we are a bunch of friendly peeps coming together every wednesday morning for a fun session - look up this thread if you want to join us.
It’s a great mix of both high intensity and low intensity and towards your goal races more specific work that prepares you super well to your events - going for the win or not!
What is cool though is that it adapts to you - and what you do. Don’t look too far ahead of the first plan, as it will change depending on what you do. You also need to kind of trust your gut and make changes that make sense to you. For example, I extend my longer rides and runs when I feel I have the energy and I can recover from them without getting injured or sick. So always remember your own context. As a busy mom of three- there are plenty of situations where I need to adapt the plan and make it my own.
I came to Athletica as a 43 year old overtrained female athlete. After trying other platforms that give you 10+ high intensity and zone work- Athletica just works for me like cat’s meow.
But, better try it for yourself and play around with it to see if it suits your needs.
Let us know if you have any other questions.