I'm planning to get Botox for my forehead wrinkles and between my eyebrows. Will my facial expression look awkward?

I think the wrinkles on my forehead and between my eyebrows have deepened because I frown so often, so I'm considering getting Botox.
Now that I’ve entered my 40s, I find that I look old quickly if I don’t manage my wrinkles, so Botox seems essential. I’m worried that my eyebrows might curl up or my facial expressions might look too unnatural after the injection. I want a natural-looking result, but it is really difficult to find a place that administers the right dosage.
I've heard that the treatment cycle for Botox is usually between 4 and 6 months. How do you all manage your skin? I've heard a lot that it is best to prevent wrinkles with Botox before they become completely permanent.
Cost is important, but above all, I think it is crucial to receive treatment from a doctor with extensive experience in Botox procedures. Sometimes, when I see reviews mentioning that eyelids feel heavy as a side effect of Botox, I get scared.
Still, I can't give up on Botox because the wrinkles are so clearly visible every time I take a photo. I'm wondering if getting Botox on the glabella along with my forehead creates a better synergistic effect. If you have any information about a dermatology clinic that performs Botox meticulously and at a reasonable price, please share it. I want to take your valuable comments into account and finally get rid of my wrinkle worries and look younger this time~