Hi Lars, I'm in a slightly different situation from you (my 42 year old husband is in remission from non-Hodgkin's lymphoma.) but thought I'd say hi. We found The Warwick Foundation to be a great source of support through his treatment and afterward. They are a charity devoted to people aged 25-40 who have cancer. They have a peer support program called "Mates in My Shoes", which aims to match up people with similar demographics and similar cancers, so they can support each other. The website is "www.thewarwickfoundation.org" if you want to have a look (They're based in Melbourne, but operate all over Australia). This website is also a great resource for support and information.
Good luck with everything! I imagine Hodgkin's and non-Hodgkin's lymphomas are fairly different, so I don't know if my experiences will aid you at all; but I can tell you that my husband has been in remission for nearly 2 years now, and we're currently having a 2 month overseas holiday, which would have been unimaginable 18 months ago. Take things day by day (such a cliche, but still so true), and one day soon you'll look back and be amazed at how far you've come.