Did you select the TIleEd Map and press F to centre on it?
Are you looking at correct location, where you painted tiles, in scene view?
Expand the TileEd map object and see what is in there, Select one of the tile objects and press F to centre on that object.
Pressing F will only work when the scene view is focused so you need to middle or right click in the scene view after making your selection in the hierarchy and then press F. Do not left click in the scene view since that will change what is selected in the hierarchy.
Since I'm a new user I can't post links, so add a http: in front of each link.
You should be able to upload images to the forum.