Im trying to join the canadian military, and need to pass the FORCE fitness test. I have never really kept up on my fitness, and for the test, I need to be able to do

Sandbag Lift: 30 consecutive lifts of a 20 kilogram sandbag above a height of 1 metre, alternating between left and right sandbags separated by 1.25 metres. 
Standard: 3 minutes 30 seconds.

Intermittent Loaded Shuttles: Using the 20 metre lines, complete ten 20 metre shuttles alternating between a loaded shuttle with a 20 kilogram sand bag and unloaded shuttles, for a total of 400 metres. 
Standard: 5 minutes 21 seconds.

20-Metre Rushes: Starting from prone, complete two 20 metre shuttle sprints dropping to a prone position every 10 metres, for a total of 80 metres. Standard: 51 seconds.

Sandbag Drag: Carry one 20 kilogram sandbag and pull four on the floor over 20 metres without stopping. 
Standard: Complete without stopping

What would the best excercises to start with to be able to work uo to this? Im training fir it at home im not going to get a gym membership because i will be getting one through school woth ot starts up. At home i have a barbell, and a dumbbell with the equilivent of 135 pounds if plates. (I have so many because i bought them both used, and they both came with their own sets of plates.). Thanks