“Should I hire an attorney?”  is a question that each one must answer for themselves. 
To make a quality decision, consider the following:

1. An attorney's first duty is to what or to whom?  If We consult the latest Corpus Juris Secundum (C.J.S.) legal encyclopedia, volume 7, section 4, We will find that an attorney's
first duty is to the courts and the public; not the client:

2. What is the legal relationship between an attorney and the client?  According to
Section 2 in said  Section 7, We find that clients are “wards of the court:”

3. What is a ward of the court? According to a court case, “wards of court” are infants
and persons of unsound mind:

Are you an infant or person of unsound mind?  Wards of a court need an attorney
to speak on their behalf.

4. Do you need to challenge jurisdiction?  Better read the following;
particularly "...because if pleaded by an attorney....."

In My opinion, these are the conclusions I would make:

1.     When one hires an attorney, they become a ward of the court and accept the venue
and jurisdiction of the court for the matter at hand.

2.     One should not hire an attorney if one wants to challenge venue and jurisdiction.

3.     If one wants to challenge venue and jurisdiction, one must do so as a "sui juris"
and or "in propria persona" and without an attorney.

Therefore, should one hire an attorney?

In My opinion, ABSOLUTELY NOT!