Hi Zoe, I usually pick a library that fits the style of the product. If I have to create any additional icons, I bring some of the icons together into Adobe Illustrator and create new versions of the icons I might need, but this happens very sparingly.
I love using icon libraries because they're already very consistent, pixel perfect and work well together.
Here is a set of cute and friendly, plus huge icon library you might already know of: https://hugeicons.com/
Designing website favicons or product icons is like choosing the perfect outfit for a first date – you want it to be simple, memorable, and make a great impression. Not quite an expert? That's okay! Sometimes it's all about learning and tweaking, kind of like crafting the ideal profile with "Her Ideal Match."