Everyone just gave you a ton of great advice!. Yep...your life is forever changed, but that does not have to mean you totally give up what you love to do. You just have to do it differently, and perhaps a bit less often. Early on with an infant, there is not much you can do that includes Mom, baby and you on a bike...so you will have a dry spell. You may miss it, but it WILL be well worth it! I think it is important for you to realize that you can and will have those good old times back...and from my personal experience, it is very much possible.
I have two sons, age 15 and 13. In years BC (Before Children) my wife and I did tons of cool stuff. Extensive back country back packing, Tons of street bike riding (long distance sport touring stuff - I had gotten out of dirt bikes not long before our oldest was born), tons of hiking, snow shoeing etc. etc. Believe it or not...none of that went away! Well, for a short while I guess it did...but not for long. In fact, now I can hardly imagine life with out kids...and would not want that to be the case
You gotta be creative, willing to adapt. You do need to be aware that you now have a kid depending on you, and if you do ride, you likely should back it off a notch or two.
By the time our oldest boy was 1 month old, we were out snowshoeing with him in a front infant carrier. By modifying our distances, by being creative with packing stuff (and me being dumb enough to carry some hellishly heavy packs!), we did week long back packing trips above treeline when he was 18 months old. We just had to get creative in how we did it. Yep...tons of extra work, but well worth it.
I had to find a way for us to keep riding on the street. So, a sidecar appeared in the garage. NOTHING like a solo bike...but it was a bike. When the oldest was 3, and youngest just 11 months old, they did their first side car ride - and eventually logged about 50,000 miles riding in that sidecar. By the time they were 6 and 8, we started riding off road together. We have had TONS of fun. Yep...i fouled lots of spark plugs putzing behind a 6 year old...my wife following along on the quad. But well worth it!
Then, as someone else pointed out...they seem all growed up! I did a race just today with my youngest son (Family Enduro Series) Neat thing is, you get to ride along with them to help them out keeping time. Had a BLAST teaching him how to keep time for enduros. Seeing the look on his face as we zeroed checks was worth 13 years of waiting!
Keep you focus on your wifes and babys immediate needs. Keep reminding your self, of the great times to come in the future. After things settle down a bit, and a "life with baby routine" develops - see if you can find some creative ways to include the whole family in some of the activities you enjoyed in the past. Cherish these times!