"My grandad had 1 sister Greta & 4 brothers who as far as I know lived & died in various parts of Newfoundland"
-----------
Out of curiosity, is this the family on the 1935 Census? I've left out the names of the two youngest sons, since they could be alive. If you know that they are not alive, then feel free to post their names.
Newfoundland's 1935 Provincial Census
District of Bonavista
Community of FAIR ISLANDS
BOLAND David Head M M 44 C of E
BOLAND Lydia Wife F M 42 C of E
BOLAND Greta Daughter F S 20 C of E
BOLAND James Son M S 17 C of E
BOLAND Wilson Son M S 15 C of E
BOLAND G. Son M S 10 C of E
BOLAND J. Son M S 4 C of E
http://ngb.chebucto.org/C1935/35-fair-isle-bon.shtml---------------
"I would love to make contact with my long distance family"
To do that, you are looking for living people, which is pretty limited on rootschat, and then usually by private message. Make two more posts to qualify for PM.
In general, I would bring the tree down as far as I could to the present time, and then look in telephone books and directories for the surnames. For example, using canada411.ca to look for Bolands in Bonavista found 215 results. Maybe you can narrow it down if you have the first names of living people in your tree.
https://www.canada411.ca/search/?stype=si&what=boland&where=Bonavista%2C+NL There might also be references to them in newspapers, but I don't have access to any newspaper sites, and don't know which are best for Newfoundland anyway.
----------
If you want help working backward, post what you know about your grandparents, assuming they have died, and people will see what they can do.
---------
If you get no replies in a day or so on this board, then try on the Canada board, but include a link to the .url of this post when you do, if you can. That is so people don't duplicate what has already been posted.