If this kit contains a bunch of through hole components, I’m sure that you can do the soldering yourself. If it has surface mount components, I’d probably let someone else build it for you as you were considering.
If you’re concerned at all about getting over the hesitation of when you don’t really know how long to hold the iron in place or the best place to hold the solder reel etc, you might want to order something like a soldering practice board. It will have simple circuits that can complete and see that they work and gain a little confidence over a weekend or whatever.
If it’s your first time soldering anything, I’d probably make sure that you buy solder which already has a rosin core, and then a desoldering wick and a cheap (like sub $10) desoldering pump (solder sucker). It will just put you in a little better position to succeed or to back out of any mistakes.
Something like this is really helpful too, I usually put some heat shrink tubing on the alligator claws to make them less sharp (they don’t bite the boards or wires as much then). Sometimes it’s called a “helping hands” tool, or a soldering station depending on how well outfitted it is.
There are varying degrees of cheaper to higher quality ones, but any of them is a good inexpensive start to your project. Another super basic but easy to overlook thing, is that using more flux is always better than less and it isn’t going to hurt anything.