In reply to anonymous123:
Probably four common routes:
1) Self taught perhaps with a buddy / friends. I would strongly recommend the book Alpine Mountaineering by Bruce Goodlad as a starting point.
2) Find an experienced mentor / group. This could be through joining a club, talking to as many climbers as possible about your alpine ambitions or perhaps through an on line post. ( Be aware, the mentor may not know as much as they think and this can be very hard to judge.)
3) A course run by guides is more economical than standard 1:1 or 2:1 guiding. I would strongly recommend the Conville Courses; https://www.jcmt.org.uk/courses/
4) Hire a guide for a fully personalised and tailored approach.
Each of these have advantages and potential pitfalls and some people prefer one approach over another.
In answer to your other questions:
- Practice 'alpine' climbing skills in the UK and then go alpine climbing as much as you can. Eg; long summer days ( 12 hours plus ) linking scrambling / rock routes and get lots of pitches in.
- You can rock up at a campsite ( for example the Argentiere campsite ) and look for potential buddies there or through the local guides office. This suits some people and not others. Also note comment on 2) above. Personally, I prefer to have climbed with someone a few times first before doing any alpine climbing with them.
Hope this helps, see you out there