Lee1974, welcome to Tropical Fish Keeping forum.
As you are new, may I point out our fish and plant profiles section, second tab from the left in the blue bar across the top of the page. Each fish profile has info on minimum tank size, minimum number of fish for shoaling fish that must be in a group, water parameter requirements, and other data.
Having live plants will all but eliminate the initial cycle, plus the fish being mentioned are best with plants around them. You might get ideas in our Aquarium Plants section of the forum.
A 70 liter is a 20 gallon tank (for those of us who "think" better in Imperial rather than metric
) so you could have a nice interesting community with small fish and plants. No mention is made of your tap water parameters, so just be aware that some fish have more specific needs than others. This is mentioned in the profile for each species.