shaping eyebrows with razor. any advice?

hii everyone! i have super thick eyebrows and have been using tweezers to thin them out for probably longer than i should. i like them pretty thin and straight. i am happy with my eyebrows, but i know in maybe 3 years ill want to try something different and if i pluck them too much, they wont grow back great. i decided ill start trying to shave them but im not having a ton of success. i have tried a couple different "eyebrow razors," and even with them its hard to get a close enough shave without messing up what i want to keep. i also have thick, dark hair so just one day, sometimes less, after shaving them, you can see the funny looking spots everywhere from the hair follicle. theyre sometimes even visible right after i shave them. im not super happy with the daily maintenance and the difficultly of getting close, although i will say i have only been trying the shave method for about a week but im not loving it. any advice? thank you!!