I was where you were at a few months ago when I could feel my life getting much smaller, and I was looking for alternatives other than surgery (e.g. stem cell). I would encourage you to keep reading, watching videos of recoveries, and I suspect like me, you will get many questions answered.
Like you, getting back to an active lifestyle is very important. I went to two different surgeons, and they both had different outlooks on what could/could not be done post surgery. My current surgeon essentially has no restrictions, although suggested running is only successful for about 30% of his patients. I also researched the type of implant and asked during my pre-op appointment, but now can't remember. What I learned was choosing a surgeon is the most critical decision. I am fortunate to live in a location, with many top docs but was very open to travelling to another part of the country if necessary. I also wanted the anterior approach, due to the many initial benefits I learned about that approach. My surgeon is a fellow, well respected, and was referred to me by my private doctor who is fastidious, and is also facing a hip replacement.
As to the length of how long an implant works, I am around your age, and my surgeon suggested that I may not have to have it replaced. However, so much depends on many factors, and I knew the most important thing was to move forward with my surgery. You will find many people, myself included, once you move forward, I look back at the almost 2 years I lost being in the state of denial, and finally acceptance that I needed to do something.
As to how long out of work, I may be back after two weeks away, but I have a desk job. I am on Day 6 of recovery, and everything is going very smoothly.