It’s 4300 and 5 days to take the new salesforce administrator’s course but the outline for the class is available online and while you won’t get a certificate for teaching yourself, you can definitely do it even without access to the program. There are videos on youtube and other tutorials out there for learning to be a SalesForce Administrator.
Put it on your resume and if it becomes necessary, learn it.
I can do this because I tend to pick up new software quickly and easily, but if this is difficult for you don’t do it. I’m just saying that SalesForce is an important piece of software for people who work in marketing and if you want to learn it so you can be more marketable yourself, the knowledge is out there. It’s available. Take it.