The following maillist can be overwhelming but well worth the time.
Send a message that only says one word, Subscribe. Put that in the body of the message. Send that to firstname.lastname@example.org. (That -l- is the letter 'el', not a numberal one.)
If you prefer a group of messages be sent to you instead of one by one, use this address, tmg-Demail@example.com.
I prefer the digest. Each digest usually contains about 15 messages. And there may be two to six digests sent each day.
Both the Arlington VA RUG and the Portland RUG are publishing helpful articles about using TMG in their (our) newsletters. Membership in either (each) group is $15 a year. You may find $30 to be a bargain.
There are other TMG websites packed with help. When I got lost using the TMG manual, I found TMG company (Wholly Genes) online support to be wonderful and fast (compared to UFT company official support).
I will leave your second question for others to answer.