The spiritual condition of a Church will inevitably vary from place to place, and in my experience not all SDA Churches are able to deal with seekers in a sensible way. In some Churches visitors are treated as if the came from another planet

But mind you, this will be the case in other denominations as well, don't for a moment think that this is a problem that you'll only face in relation to SDA churches. The spiritual condition is at a low in Christendom in general.
So, is there any other SDA Church nearby? Perhaps it would be a better idea to visit another SDA Church a little further away rather than going to the Church that is geographically closest to you?
When it comes to transportation
It might sound strange at first, but paying for transportation in order to get to Church isn't Sabbath breaking according to Ellen White, so I wouldn't be afraid to use a taxi to get to Church if I were you.
The idea is that some things are necessary even on a Sabbath. For instance, people in hospitals and homes for the aged need to be fed and cared for, and I think it's possible to argue that public transportation shouldn't be completely shut down on the Sabbath. If you became sick on the Sabbath and had to go to the Emergency Ward you shouldn't feel bad about using a taxi, and the same thing is true about going to Church.
In fact, adventists living in Israel complain that going to Church is a real problem because of the lack of public transportation on the Sabbath.