I'm a brand new rookie here.  Does the capacity of a ballpark affect revenue and ticket sales?  There are some small ball parks that intrigue me that I don't want their tiny capacity to put me at a disadvantage.  Please advise.  Thanks.

Nope.  You have the same budget as everyone else, regardless of your ballpark.  You don't have to worry about revenue or ticket sales.

I'd pick a park with a neutral singles rating and probably pretty neutral overall. Ballparks can be tricky to work with, and being new, you need as few extra headaches as you can manage.

It it's overwhelming off the bat, then it makes sense to pick a nuetral park and see what kind of team you have.  But finding a park that can make your strengths stronger (power team? find a park where its easier to hit homers) can probably get you a few extra wins every year.

It's my philosophy that if you have a good hitting team, you should go with a pitcher's park, and if you have strong pitchers, go with a hitter's park.   That way, your good talent can make up for the park effects, and the park will take care of your team's shortcomings.  Anyone else think this way?  Oh, and by the way, pick your park, and tailor your team to it, not the other way around.  Many people get annoyed when people whimsically move their teams around from year to year.

For the most part, I would ignore park effects when buidling a team; good players trump just about anything else.  There are in my opinion 2 exceptions:
1)  Massive hitters parks lead to more pitches thrown per season, so you need to manage that either with a 12-man staff, or a modest focus on stamina, or a focus on control, or something.  You don't want to have more in-game pitching fatigue than your opponent game after game.
2)  Certain parks (TOR is one extreme, DET the other) have very different effects on HR and singles.  If you're in one of those parks it's probably worth changing your emphasis accordingly (but not too much) on power and GB/FB.

Others could validly disagree, I don't have real data showing that any of this works.

The best I've seen someone do with working with park effects has been a team in Santa Fe (+4 across the board). He took advantage of the guys with great power and eye but poor contact and below average splits (which you can get off the scrap heap at times), and targeted on groundball pitchers.