IMO, in order to build a table that you will be happy with you first must have patience, attention to detail, and recognition of when those attributes are slipping (due to fatigue, being in a hurry, etc.), so that you can step away before you screw something up. If you do each individual step to the best of your ability, your overall project will be the best you are capable of with your current experience, and will generally be something you are happy with.
Assuming the above is true the next thing you need is a plan. Not just the look and dimensions of the table, but an idea of how you are going to accomplish cuts, glue up, joinery, finishing, etc. That will come from either a plan you are following, someone to guide you, or your own knowledge.
If you've got the two items above covered, go for it! It really doesn't matter if you've done the techniques before because if you have the right approach (paragraph 1) and know what you have to accomplish (paragraph 2) then you will be successful. May not be perfect, but it will at least be good enough, and no one will likely notice any imperfections except for you. The average person will not look that closely.
When I build things I often do a lot of the tasks twice. Once for practice or to see how it will go, and once for real. I'll cut a rabbet on a piece of scrap before I do it for real. I'll dry assemble before actual glue-up to make sure I have enough clamps and time to get it glued before things start drying. I'll sand/stain/apply polyurethane on a sample to see how it looks. That way when I do it on the piece I'm making it comes out the way I want it to.
When you get down to it, all you are really doing is cutting wood into smaller pieces, then putting the pieces together in the shape you are after. Since you are still fairly new to this game, you may want to consider making it out of, say, pine rather than something like oak. Much cheaper and easier to work.
I vote you make it.