Hi and welcome to VCA and this forum! We are a bunch of friendly, excitable people who love to see and talk about VCA!
Here are my thoughts to share...
- If you plan to purchase other pieces, it is worth developing a relationship. If you plan to only get this piece and perhaps a second piece, then I personally do not think a relationship with a SA is necessary. I would just purchase online as online shopping is quite easy, especially if it's a big hassle for you to get to a boutique.
- The big pro of purchasing online is that you can return the piece. As a new client purchasing at the boutique, my guess is they will only give you store credit for your first purchase should you change your mind. You will not get full refunds until you build a relationship at the boutique. For your pendant though, you may be 100% sure you want this pendant, so this may not be a deciding factor for you.
What would I do?...
- I also do not have a VCA near me. For me, I like going to a boutique for fine jewelry purchases. It gives me the chance to meet a SA and also try on other pieces. The most important aspect to me, above all else, is the aftercare service from the SA. If I have any issues, I know I can text my SA, and he will take care of it of it for me. You never know with fine jewelry the unexpected things you may need in aftercare, even months after the purchase (e.g. you need an adjustment).
My suggestion on the pendant...
- The Sweet Alhambra pendant is lovely, but it is very small and dainty. It barely shows up on some people. The dainty look may be the look you are going for, and if yes, it's the perfect pendant. However, for peace of mind, I would suggest you try both the sweet and Vintage size. You can try on both at the boutique, or you can order both online. This way, you can compare and be sure. If you order online, you can return the one you do not want. I am a big fan of checking "fit and size" and always do comparisons for peace of mind. Fine jewelry is too expensive to have regrets.
Important thought...
If you do order both pieces online with the intent of returning one, I would do this in two separate transactions. This will give you two separate receipts/transactions, one for each item vs. one receipt with two items listed on a single receipt. It's a minor point, but I would think for your very first piece, you would want one receipt showing the single item you purchased, and not a hodge-podge receipt with two items. I think it will make the purchase more special for you.

Hit the boutique!
If you can make the trip to visit a boutique, I would definitely do that, especially if you plan to buy. I would take this opportunity to look at the other pieces and see them in real life. Then, when you get back home and browse online, you can visualize the pieces better as you have seen them in real life.
Good luck to you! I know you are so excited, and I am so excited for you too!
Please share photos if you wish! We love to see bling!

Hope this was helpful.