What's the best free CAD program for 3D printing?

Simple fix. In order to initiate PMs, Trust Level (TL) 1 (BASIC) must be acquired. We need to spend enough time on the site to hit the necessary targets. We can track our badges on our profile to see what “trust level” we have attained:

As mentioned on the “read first” thread READ FIRST: Welcome to the Dallas Makerspace
the quickest way to to achieve TL1 or better is to interact with DISCOBOT; look for the “Welcome” PM from Discobot, and play along to learn about Discord and how to interact with it. TL can be increased through regular use as well, but that shortcuts the process in a fun, educational way.

Yes, TL0 can respond to PMs, simply cannot initiate, as enumerated in the pinned “Read First” thread READ FIRST: Welcome to the Dallas Makerspace