I am a 35 year old from Philippines. I have a Spanish citizen girlfriend who wanted to sponsor me to go to Spain. Take note I have never applied for any visa before and so I applied for a single-entry Schengen visit visa on November 15, 2023. My intended travel date is from December 23, 2023 to March 21, 2024 which is exactly 90 days.

Here are the documents I submitted for my application:
 - Cover letter stating the main purpose of my trip is to visit my
   girlfriend. A brief summary of how and where we first met and that she went to the Philippines twice in the past 2 years and that we travelled together within the Philippines.
 - Application form.

   [![enter image description here][1]][1]

   I wrote N/A in Current Occupation because I am unemployed and the reason for that is I full time manage our small family business. Which I also mentioned in my cover letter (only the part that I manage our family business).

   [![enter image description here][2]][2]

   As for the part where who will cover the cost of travelling and living during applicant's stay I mark both even though I don't have money in my bank and my girlfriend will sponsor everything.

 - Carta de Invitacion (Invitation letter from Spanish police). It state relationship with applicant is "Amistad" which I believe translate to "friend"

 - My bank certificate and bank statement of for the last 6 months.

 - My girlfriend's bank certificate, statement of account for last 6
   months, DNI, Passport, Empadronamento

 - Some screenshots of our text and chats conversation and pictures of me and my girlfriend together to serve as a proof of our relationship.

Unfortunately I received the refusal letter on November 24, 2023. It says "The visa has been refused" with the following reasons:

 - Justification for the purpose and conditions of the intended stay was
   not provided.
 - You have not provided proof of sufficient means of subsistence for
   the duration of the intended stay...
 - You have not provided proof that you are in a position to lawfully   
   acquire sufficient means of subsistence...
 - The information submitted regarding justification for the purpose and
   conditions of the intended stay was not reliable.
 - There are reasonable doubts as to your intention to leave the
   territory of the Member of States before the expiry of the visa.


Now here are the mistakes that I think I made during my application:
 - I didn't include a sponsorship letter from my girlfriend saying that she will will sponsor everything.
 - I marked both the options of who will cover the cost of travel and
   living.
 - I mentioned girlfriend in my cover letter and application form when
   in the carta de invitacion it says amistad
 - I mentioned "explore Spain" in my application form as additional
   information on purpose of stay since maybe it made the officer think I am going for tourism instead of visiting my girlfriend and that contradicted the "visiting family/friend" I marked as main purpose of journey.

I know my application is of great disaster and so here are my questions. Should I appeal for reconsideration? If yes can I include new supporting documents when I submit my appeal? or should I just try to apply again? If yes is it okay to apply again immediately after my first refusal result?  it hasn't been a week since I got the refusal.

  [1]: https://i.sstatic.net/IYKct.png
  [2]: https://i.sstatic.net/ljKqb.png