Do you put a comma after the word Although if it's the first word in a sentence?

No. That is not how commas are determined to be used. Commas set off a list of things, or they separate certain clauses or phrases from the rest of the sentence.

Example ; "Although Ted had socks, briefs, and tees, he could not find his garters, although, his mother believed, he might have found them had he looked closer."