How to communicate officially wit my first inspection as landlord

[Debasish Bhattacharjee]

Being a first time landlord inspecting property for the first time raises few glitches and below are those. Need suggestion on how to communicate effectively to tenant by maintaining no law break. Property is located in  California.
1. Lease had a condition to maintain the garden, if not maintained, the landlord will hire a gardener at the tenant's expense. After 18 months during my first visit I have observed the backyard is not maintained, few sprinklers are not working etc. What should I be doing?
2. Lease also had tenants to mandatorily have renters insurance throughout tenancy. Tenant provided me 1 month's renters insurance before they moved in and after that I didn't ask for it, but during inspection, I do reveal that the tenant didn't carry renters insurance throughout the last 18 months. Other than my ask for them to carry future renters insurance, what should be done for the past period for which they breached the contract? Would that be treated as low priority to ask for?
3. They have placed a dish network (through dish tv) on the outside of the wall and I do see a very minor crack. What should I communicate? I have shown all those in front of my tenant, but haven't prepared an official report as of yet.
4. Tenant was provided with a few fire extinguishers, two carbon monoxide cum smoke detectors which were affixed to the wall. During inspection those were missing and the tenant was not able to tell where those fire extinguishers were and also have given a vague explanation of smoke cum carbon monoxide detector not working or was making sound and due to that they had to remove it without replacing batteries.
5. The garage was given with epoxy coating, now it looks like a lot of stains. Should I ask to be cleaned or not required.

Any idea / what should I ask for or what I described above can be ignored would be super helpful.