I agree that your best bet is to contact an attorney who can get the case in front of the prosecutor and judge and possibly keep you out of jail.

You have several options here. One, you just bite the bullet, turn yourself in, and wait to get arraigned. That means you get processed at jail and get arraigned by video, and bond set. However, the most prudent decision is to hire an attorney, and have the attorney contact the prosecutor and court, and get the warrant quashed in exchange for turning yourself in after the COVID-19 emergency has passed. Courts do not want people coming into court right now, if it is not necessary, and jails want people to stay out if able. So there is a shot at keeping you out of jail, and getting this handled later. BUT, you need to get on this now, and hire an attorney. Don't know what county your charge is in, but best bet is to find an attorney in the county where you are charged. Local attorneys have good relationships (if they are good attorneys) with the local prosecutors. So get on it. Start calling attorneys.

Agree. Hire an attorney immediately and that attorney can review your case status, assist with getting the warrant served, review case for evidence, discuss with prosecutors, etc. Not going to be good for you being a fugitive for the rest of your life.

You have likely now been charged with failure to appear and may remain in jail without a bond until a court date. You should consult with a criminal defense attorney before turning yourself in. Perhaps he or she can negotiate a plea agreement as to the failure to appear and see if the assault can be dismissed prior to turning yourself in. In any case, please hire a local defense attorney to help you.