It is very important to the condition report in ASAP. They should have had it to you before you moved in. I'm not sure where you are but I believe in qld it is supposed to be returned within 3 days of entry. Note everything. Do not sign a blank one to be filled in later (stupid naive never rented before me got caught out with that - was ok in the end but caused unnecessary drama). Take a copy before you return it and keep it somewhere where you will find it when you move out.

Little things that you can fix yourself - most landlords would probably be grateful if you did, but as PPs have said, just be wary as you will most likely be liable if you cause damage. Re the garden - Some contracts will stipulate that the tenant must maintain them, others, the landlord will maintain. I would think if your DH likes gardening and wants to do it, your landlord should thank his lucky stars because most tenants wouldn't bother.