Hi, Lee
Nobody can guarantee that you'll find the perfect teacher. If you know where you're at and what you want to achieve, if you have clear objectives in mind, etc, it's a good start. Then, keep in mind that on Italki:
1) Some teachers offer trial lessons, which are shorter and cheaper than the usual ones
2) Decide whether you want a teacher (with teaching background) or a tutor (no teaching background)
3) Each and every teacher/tutor has an introductory video. This way you can hear them speak in your target language. You can also find out a bit about them, see their face, hear their voice. Choose the one(s) you feel a connection with
4) Check what kind of lessons they offer. Some offer only conversation practice, others can prepare you for different exams. Some require an intermediate or a higher level, some teach beginners as well
5) Look at the teacher's profile, read the reviews there, etc
6) There are a lot of filters on Italki. You can select according to the mother tongue, the country they are from, the languages they speak apart from your target language