It will be the 28-year-old's final November appearance this season, as he cannot play in next week's clash against Australia, and he is determined to make the most of it.
"I have had a bit of experience the last couple of weeks coming off the bench (against South Africa and Argentina), but it's going to be nice to start against Tonga," he said.
"You ask any player and they will tell you they want to be in that starting team all of the time. You do get frustrated at times, but you have to keep your head and keep working.
"I am just pleased to have an opportunity on Friday night. I have never given up hope, but the way the team has played the last couple of years it's been very difficult to get back in that starting line-up.
"I want to do the basics, everything well, and not try too hard because it can go the other way.
"I want to do what's right for the team. It would be nice to put a good performance in, for the team and individually."
Wales coach Warren Gatland cannot consider Hook for the Australia Test because it falls outside the International Rugby Board autumn window and Perpignan have first call on his services for their Top 14 appointment with Clermont Auvergne.
Hook does not have a clause in his Perpignan contract that permits release in addition to recognised international weekends, which has occasionally frustrated Gatland and often raised question marks outside the Wales camp about any long-term Test future.
"I've no regrets about it (moving to France), It has enhanced my rugby and I think I'm a better player because of it," Hook added.
"It has given me the experience of playing in a different league and got me out of my comfort zone, having to speak a different language and so on.
"In an ideal world you want to be available for next week. I'm not, so I just get on with it."
Tonga, meanwhile, will field a team showing four changes from the side beaten by France last weekend.
Prop Sona Taumalolo, who is serving a four-week suspension after being sent off for striking Les Bleus lock Yoann Maestri five days ago, is replaced by Melbourne Rebels' Eddie Aholelei.
Two other switches in the pack see starts for tighthead prop Sila Puafisi and number eight Viliami Ma'afu, while Latiume Fosita gains a place at fly-half.
Tonga will meet Wales for the first time since they suffered a 27-20 defeat during the 2003 World Cup, while they were beaten 51-7 on their last Millennium Stadium visit in 2001.