No, you don't combine unrelated activities. Being a "consultant" is not a job title of value unless, perhaps, you work in IT or management consulting. If you had a design company and also worked as a fitness trainer, you have 2 Schedule Cs. For the fitness work, you should describe your business with a description of value, such 'fitness trainer".
If you truly started your LLC design business and tried to get business, your start-up expenses count now. However, if you only had start-up expenses, and did not actually begin the real operation of the business, you will hold off on these expenses until next year. Start-up expenses are capitalized, and written off (subject to some limitations) only when the operation commences. If you did little more than register, open the LLC, etc.... you may need to hold off until next year's taxes.
