There is no "one-size fits all" wedding offering, so your question is probably too open to get meaningful responses. What is a reasonable minimum in some markets and areas will be complete overkill in others.
Why not look at it from the other end - imagine yourself to be the kind of bride/groom you want to attract, and then think through what you would want out of your own wedding photography?
You have some good portraits on your website (though the site is difficult to view due to its horizontal scrolling), so I'm not going to question your technical abilities. BUT wedding photography is not about being able to take a good photograph in relatively controlled (and repeatable) circumstances, its ALL about getting a shot of a fleeting moment that's full of emotion, and doing so while under pressure - and that pressure can come from a whole range of directions - no time, poor lighting, poor locations, people getting in the way, officials who won't let you do things you'd planned, guests itching to get to the reception, etc..
Being nervous is normal - Ann and I are nervous every time we go to a wedding - we know we can do the job, we really enjoy the job, but we also want to do our very best, and we know things can easily go pear-shaped when we least expect it.
Throwing yourself bravely in is one thing, standing a high chance of coming out the other end intact is something else, and needs good preparation
- that includes preparing for things that you don't ever expect to go wrong ...like being insured, having equipment that gives you the best chance of getting a shot, having backup equipment, having excellent people-skills, having your post-wedding workflow sorted out, etc..
Rob