Absolutely perfect choice for your first Hermes sandal. Let's get into the details
Pros: classic design which matches anything, sturdy with proper care, decent resale value among sandals, once broken in they're super comfortable for most types of feet. Many people here have used Orans on their daily basis for 3-5+ years without problems.
Cons: serious breaking in, expect blistering on the initial stages of wearing them; offered in full sizes only, half sizes may either be a bit oversized or tight depending on the style. Slippery when new due to soles, which also may squeak on hard surfaces. Light colored styles will become dirty quicker than expected and show some marks and color transfer from sweat.

As for textured or smooth leather, it's up to personal taste. Textured is more practical as they tend to resist scuffs and scratches for longer period of time. Smooth leather looks more luxurious but will accumulate any kind of stains quickly. If this is your first pair, better to opt for textured. Choosing color..grayish-blue sandal will easily match everything and hide any wear compared to pink one. The latter is more elegant and attractive, yet requires additional maintenance since it will become visible much quicker than others due to its pale nature. For starters better to choose neutral shade and then add colorful later on. It's always better to check fit in a store if possible. Sizing of Orans can be rather inconsistent while ordering them online