Yes.  One solution is to take is a graduated approach from the business side.  You could begin your business by ensuring that you only sell goods or services in one specific class, and then on your trademark registration application, you could specify that one class.  However, it will be incumbent upon you to police your business to ensure that only those goods/services are being sold.  Several years down the road, when you want to expand your business and offer goods or services in another class (or classes), you could file another trademark application specifying the additional class or classes.

There is a risk with this approach, however.  The risk is that someone else could register a mark that is the same or similar to your mark, but in one of the classes where you have not yet registered.  Thus, not only could you could be foreclosed from using your mark to identify goods/services from that class, but this other party could potentially bring a legal action against you if you did use your mark to identify goods/services in that class.  

In your trademark registration application, if you claim that your business sells goods/services in a certain class, when it actually doesn't, you could wind up losing all rights in your trademark.

Similarly, if your business sells goods/services in multiple classes, and not all of those classes are specified on your registration application--that's another way you could wind up losing all rights in your trademark.
 
Some people believe they can “cut corners” on government fees by failing to mention all classes of goods/services that their business sells on the registration application.  This approach is almost always a bad idea.  You really don't want to spend dozens of years in marketing and advertising--building up your brand, and then suddenly lose all rights in your trademark.  For many companies, their trademark is their most valuable asset.

As taken from the January 15th LSIPR Newsletter:

"The claim must include additional features to ensure that it describes a process or product that applies the exception in a meaningful way, such that it is more than a drafting effort designed to monopolise the exception. Examples qualifying as “significantly more” include:

• Improvements to another technology or technical field;
• Improvements to the functioning of a computer itself;
• Applying the judicial exception with, or by use of, a particular machine;  
• Effecting a transformation or reduction of a particular article to a different state or thing;
• Adding a specific limitation other than what is well-understood, or routine in the field; and
• Adding unconventional steps that confine the claim to a particular useful application. "

The entire article can be found here:

www.sternekessler.com/sites/default/files/2017-11/LSIPR_Jan15_AfterALice.pdf

You can use the Trademark ID Manual for this purpose.  A link is provided below:

https://tmidm.uspto.gov/id-master-list-public.html

Under "ID Master List" just enter a category of goods/services (e.g. "Shirts") into the search field, and when you find the relevant category, its class will be designated as the three-digit number under the "Class" column.  

To form an LLC in California, you will have to file a statement of information which includes a $20 filing fee.  You will also be required to pay $800 to the California Franchise Tax Board within the first 3.5 months of the LLC's formation.  Every subsequent year, you will be required to pay another $800 to the California Franchise Tax Board.  That amount will be due every April 15th.