Good so far, then the next step after you select your Metahuman form is to take note of all the attribute bumps that you selected for your animal form and make the same adjustments to your Metahuman form as well. Essentially, this should mean that your attributes in both forms should be the same number away from that forms racial minimum.
For example: Say we select a Canine Shifter and select Attributes at Priority E (12 attribute points); we don't want to pay extra for our metahuman form so we're staying Human
We distribute these points as follows: Body +4 (maxed out), Agi +2, Rea +1, Str +1, Wil +0, Log +0, Int +4, Cha +0
This gives us attributes in Canine form of: Body 5, Agility 3, Reaction 3, Strength 2, Willpower 2, Log 1, Intuition 6, Charisma 2
And we use the same adjustments on Human getting: Body 5, Agility 3, Reaction 2, Strength 2, Willpower 1, Log 1, Intuition 5, Charisma 1
Not a great set of attributes, but I'm just using it as an example.
Note that with this method, you are limited to one stat at maximum in your animal form, although some GMs might force you to pay attention to both. But you'll want to be careful, because if your metahuman form has a lower attribute maximum, you could accidentally spend more points than the metahuman form allows. For example, if we had selected Troll as our metahuman form instead of human (which would cost +20 karma), the racial maximum for Charisma is 4. If you spend 4 points on Charisma, your Troll form still can't go above 4, so that fourth point is lost while in Troll form.