A warm welcome RubySunset82, I am glad you have joined us. There are many non witches on this thread- all welcome.
I would echo the advice BlankTimes has given to you.
It is very tempting to hook up with an "expert", but please tread carefully.
Can I ask how you know you have "troublesome" ancestors?
You have been advised to "rid" yourself of them, but also to build an altar?
It is very tempting to join a group, coven, spiritual leader, especially when we are starting out on a magical path.
I am sure there are many amazing groups and helpful leaders around, but this work does tend to attract people who are hungry for power and money.
It can feel comfortable to be instructed, guided, look to authority to plan and steer our magical path. Some require initiation, many have heirarchy. Perfect for some, not so good for others.
Where did your shaman train? Does he or she run groups? Advertise? Charge money?
Please be curious and wary, turn up the volume on your spidey senses- and keep safe.