Rule of thumb for Garm is he likes big ships (and he won worlds once!) Nebs can work, but command one small ships aren’t efficient because they can only gain one token, something that’s easy to do already. The only thing Garm can do if you have one is swap it out, making Leia a better choice for command one ships. @geek19 has a good explanation on his blog how Garm is different than Leia and what to do about it (Leia article.) GR75s don’t warrant a defensive officer like Lando, and three red dice on a Nebulon don’t warrant XI7s. Those are for big batteries of dice. Flight Commander is pretty much an auto include for Yavaris, and so is a reliable way to give it a squadron token (Garm helps somewhat, but not with great timing; you should have a squad token banked anyway round 2, and if Yavaris is alive round 5 things will often be disengaging.) The MC30 does not want to flak or push squads; thus, it does not want Draven or Flight Controllers. Nothing currently released wants Rapid Reload or the command change officers (Ordnance Experts, APTs or ACMs + Lando on the MC30.) Admonition is generally better than Foresight. HTTs are bad because they give your opponent choices about which defense tokens to use. XI7s do a better job, but the 30 doesn’t really need that slot filled. The bomber complement is a little lackluster against ships for its cost, but not terribly so. A Bomber Command Center would really help with consistent damage.
Have you tried reading either of the blogs @Doppelganger recommended? Cannot Get Your Ship Out is amazing, I can’t recommend it highly enough. I’m not trying to offend, but some of these upgrades look as though they were thrown on without a good reason, or without considering better uses of those points. There’s no shame at all in being new to fleet building, but it’s really important to actively work toward a solid understanding of fleet building, hopefully using some of the great resources out there. And that doesn’t just mean submitting builds for feedback, that means explaining your choices in depth, so we can understand your reasoning. Why is so much more important than what, and I (and others, no doubt) want to help on a better level than just simple upgrade changes.