What's unfortunate about a concert? Unless someone else chose it....
Don't get fussed about making adjustments too early. Ride it and as the rides get longer, listen to your body. If you have an ache, ask on here and you'll get [some] sensible suggestions as to what tweak will ameliorate it. Try them. If they work, all is good.
Ultimately, I found that spending £100-200 on a decent, independent, bike-fit was well worth the money in terms of long term comfort and speed. You can easily blow that on a saddle, but 5mm, up, down, forward and backward, not to mention cleat angle, on you existing bike makes an immediate difference. You can then transfer those measurements to future bikes (yes, there WILL be future bikes) which then informs not only the choice of future bikes, but massively short-cuts making them comfortable.
I say that from the point of view of having spent £140 on a bike-fit for my RT-58 and then being confident enough to order a slightly shorter stem for my KTM before it was delivered. By contrast, I've blown considerably more than that £140 finding bib shorts/tights that suit me. It's a perspective worth noting, especially as the shorts/tights only really last a season...
Russell