boyfriend like you is her blessing. The first thing he thinks of with his first month's salary is his girlfriend. It doesn't matter whether the gift is popular or not. The key is that it is full of your deep love.
The salary of the first month of work is often not too high, so you don't have to buy the most expensive gift. What is precious is often not the value of the gift, but the intimate love of your boyfriend. You can give her something she has always wanted but has not had, provided that you can meet her girlfriend's small wish if you can afford it.
You can also give her accessories that most girls like. If you want to be more popular, give her creative accessories. I recommend you to give her a diamond-studded makeup mirror with a mirror on which you can write blessings. The workmanship is very delicate, it looks luxurious and full of grace. Or it can be a very creative ceramic life-like statue, a silver pendant with a name engraved, or a crystal music box customized with a photo.
Even if you don't give her anything, it's good to take her to a movie, play video games, go to an amusement park, or have a small luxurious Western meal.