Could not rush it. Could read more with you partner. These are some "hub" pages that lead to more readings. There's much more out there than just these.
Could do the worksheets together.
Could learn non-violent communication. (Either of the marshal rosenberg books -- "non violent communication" or "living non-violent communication")
If you and current partner don't have the interpersonal or intrapersonal skills as strong as you'd like yet -- like knowing yourselves, communication and conflict resolution skills -- take the time to grow them so your foray into dating multiple people is a good experience for all involved.