I've been in your shoes before, trying to figure out how to get those accent marks right in Word. What I do is use the insert symbol option, it's pretty straightforward. You can go to the insert tab, click on symbol, and then more symbols, from there you can find the character you need with the accent mark. Alternatively, you can use the alt codes, for example, to get an é you can hold the alt key and type 0233, it's a bit tricky at first but once you get the hang of it, it's easy. Give it a try and see what works best for you.