You can file your own federal or state trademark application through official government portals. 
Step 1. Search for Existing Trademarks Check the USPTO TESS and your state’s database for conflicting marks. USPTO Trademark Search (TESS) - https://tmsearch.uspto.gov/State Trademark Databases - https://www.sba.gov/starting-business/business-licenses-permits/federal-state-local-licenses-permits
Step 2. Identify the Correct Class of Goods or Services Use the Trademark ID Manual to locate the class that best fits your business activity.https://idm-tmng.uspto.gov/id-master-list-public.html
Step 3. Prepare a Specimen Provide proof that your trademark is being used in commerce — such as product packaging, website screenshots, or advertisements showing the mark. 
Step 4. File the Application Submit your application through the USPTO TEAS system or your state’s online trademark portal. File Online at https://www.uspto.gov/trademarks/apply
Step 5. Pay Filing Fees Federal filing fees range from $250–$350 per class, while most state applications cost $50–$150 per class. 
Step 6. Monitor Your Application You can track progress using your serial number via the TSDR system.Trademark Status & Document Retrieval (TSDR) - https://tsdr.uspto.gov/
Step 7. Maintain and Renew Federal trademarks must file maintenance documents at the 5th–6th and 9th–10th year marks to remain active.