If as I assume that you are new to DNA then I would not rush into subscribing to Pro Tools.
Work through your high cM matches taking close looks at those who are flagged up as “Common Ancestor”.
Pro Tools is worth having once you know what and how to use it but its subscription will automatically renew. I suggest a month by month basis is probably the best way, subscribe for a month, take a few months off and subscribe again when the need arrises.