beginner

Hi, newbie here with a Covid limited budget. I'm looking at a Sony STRDH590 ( $279 ) vs a Sony STRDH790 ($349 )with Atmos as my first receiver. I only have 5 Boston speakers and 1 sub right now and will hope to upgrade to better in the future. Is the Atmos and 7 speaker option worth the extra...

So I have been browsing this forum for a few days and the amount of expertise and information here is- overwhelming, to say the least! We moved into a new (to us) house a few years ago- they had some semblance of a home theater setup in the basement that life has kept us too busy to really look...

Note: Right now I am a beginner to actually setting up a dedicated system I just watch lots of Youtube in the hopes I can have a great system someday. So I apologize in advance if I'm asking an extremely novice question or should be asking somewhere else. TL;DR look at my attached movie room...