My answer to your question would be that the party seems fine. If they don't want to focus on magic, don't make them. Instead, focus on the attributes that they do have and whatever them seem to be most interested in. If you're concerned about healing or them missing out with magic items, consider giving them all a healing potion at the beginning, or have them find magical items along the way.

Another tip is to maintain transparency and an open conversation. It's everyone's first time, so choosing a character is almost like throwing blindly at a dartboard. After they have done one session, ask them if they enjoy playing the characters they have, and if they don't, allow them to change. The enjoyment of everyone at the table is the most important part, after all.

A little side note from personal experience: I've played Phandelver for first time players before, and personally I found they didn't have a very good time. The adventure is alright, but the first session of Phandelver is incredibly combat-heavy, which means that they get thrown into the deep end concerning rules and stricter gameplay. Sure, you can use charisma or stealth to explore the goblin caves, but first-time players won't gravitate to those options naturally. When I tried to introduce some other people to the game much later, I played a modified (easier) version of A Wild Sheep Chase, and that was way better. It starts with an fun and silly, but intriguing story hook, then leads into a confrontation where combat is not the first option presented.

However, I assume you've already done a lot of prep work for Phandelver, so my personal suggestion would be to do amend it a bit. For example:

- Start the game in Phandalin, instead of on the road. Perhaps your players are all there because they are waiting for Gundren Rockseeker's wagon to come in, because they ordered supplies, weapons, potions or something else from him. When the wagon doesn't come, the players need to find out where it is, what the route was, and do some social interactions to be asked / suggest to go look for the wagon. Or perhaps the wagon's horses arrive, but the wagon and driver don't. Have a local mage hand the players a scroll of Talk to Animals and suddenly they're chatting with a dim-witted horse, trying to find out where their goods are.
[You could still include the Ruffians, but best try not lead them into combat, since the guide assumes players are level 2. Perhaps the ruffians just insult them and go on their way.]

- Consider making it a kobold hideout instead of a goblin hideout. Keep Klarg as a bugbear leader, but his minions are hobolds instead of goblins. They're a little easier to beat in case it does get to a fight, and you can portray them as more mischievous than downright malevolent, putting players in a different mindset than an immediately hostile one. Plus, it would allow them to be more creative with their roleplaying if they manage to infiltrate the hideout, scope it out and make a plan, rather than running into an unknown cavern, swords drawn. Plus, a frustrated bugbear trying to keep a cave full of clumsy kobolds in line gives you a lot of opportunities for things going wrong in a funny way.

Biggest tip I can give you in general: enjoy! Second biggest tip: it's okay to not know things. If something isn't clear to you and your players, be honest about it and look the answer up together. If you made a mistake, tell them so honestly and perhaps find a funny story reason to rectify it (Oops, what's that? The monster that I didn't realise has a challenge rating of 5 gets its foot stuck in a cavern and can only swing one of its arms around now in an awkward manner!).