The National Institute of Standards and Technology (NIST) maintains a useful page with the current best values for many fundamental constants (along with their uncertainties) at http://physics.nist.gov/cuu/Constants/.
The standard guide to uncertainties, published by the Bureau International des Poids et Mesures (BIPM), is GUM: Guide to the Expression of Uncertainty in Measurement, commonly known as "GUM". The full guide is intended to be complete, but can be rather dense to read.
NIST maintains a publication summarizing those guidelines: See Guidelines for Evaluating and Expressing Measurement Uncertainty. Also, be sure to check out the Uncertainty Machine.
To obtain a student copy of Wolfram Desktop, visit the following ITS web site: https://help.lafayette.edu/wolframdesktop.
There are a variety of on-line tutorials available for Wolfram Desktop (formerly known as Mathematica). I recommend going to Wolfram.com and exploring their on-line resources. Time spent learning some basics now will be time well-spent. If you find the Mathematia syntax occasionally confusing or mysterious, it can be a real time-saver in the long run to try to grapple with it now.
Some students have reported the following to be useful:
Many students find the cloud-based Overleaf version to be very convenient. That site includes plenty of tutorials, visuall editors, and other support tools to help tackle problems large and small.
If you want to download and install your own copy, or find official information and documentation, the best place to start is the TeX User's Group (TUG) website. That includes links to download and install LaTeX, as well as links to various getting-started tutorials.
Once you have installed LaTeX or set up an online-account, you can download the sample documents for this course, including a large example from the American Journal of Physics. That document is intended as both a tutorial and a template for you to use to write your own report.