Welcome to the Uphill Athlete forum.
Read this article that provides a good overview of Training for Mountaineering.
I would recommend the 24-week mountaineering plan
Be conservative with the training volume as you start your first cycle. You may want to scale down the weekly training volume based on your training history.
The schedule is reasonable and you should be able to cycle through the 24-week plan to train for your goals.
Wish you the best!