Don't be cautious- he's just given you good advice by telling you what worked for him. You'll soon get bored if you just spend all your spare time thinking about sobriety and not actually taking time out to fill it with
things you enjoy doing. The whole point of getting sober in the first place is so you can enrich your life with actions that are pro active and enjoyable. So, what's stopping you? I'm 7 days sober today, and I have a ton of hobbies and tasks I'm taking on. Procrastination or obsessive thoughts are out the window now! I'm taking on this new life head on!
Don't think about it- just
do it!!