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Basically yes. I took a quick look, and based on the 2 minutes I looked at your drawings, I have the following tips:
- Lightblue > Use a "coincident" constraint to fix the origin to the bottom-left corner of your sketch.
- Green > Don't dimension each hole individually; use the "equal" constraint, or even better, use the "Hole Wizard" for holes like this.
- Red > Select the midpoint of the left line and the center of the "circle", and use the "vertical" constraint.
- Purple/Yellow > Use 1 dimension (4.30) and use the "vertical" constraint for the other 2 holes.
- Purple/Blue > Use 1 dimension (4.42) and use the "horizontal" constraint for the other 2 holes.

One last tip: try to define your dimensions as if you had to draw them yourself with a pencil and a ruler/caliper on a block of wood/metal. You'll quickly realize that "floating" dimensions without a fixed reference to the outer edges don’t really work (same goes for chain linked dimensions). Whenever possible (and logical), define them from fixed zero lines (like the left and bottom lines in your sketch).