hello! i think this is a good project for you to do and with the time you have to finish, i think you can accomplish it. while i havenāt sewn anything this extravagant yet i think if you put your mind to it, it will come great.
tips from my own experiences:
š§µ choose fabric carefully
not sure where you are with hand sewing, but thereās so much that makes life easier when you get the right fabric, needle, and machine attachments. personally i have stuck to non stretch fabrics (mostly cotton) for my projects because itās easy to work with and you really just need to straight stitch. if you want to use some other material, you should research what needle, stitch, and machine attachments work best with it and practice first
š§µ go slow with your project
when you rush things go awry. pace yourself throughout the months when you are making this. sometimes that looks like having one day devoted to assembling the pattern and cutting out the pieces, next time itās starting the sewing. for example, i had a cosplay i made on and off for 2 weeks because i wanted to make sure it was fine a few days before the convention.
š§µ draft the dress
it says for this pattern listing this is a drar-at-home one. i think before you make the real thing, you may want to draft this with some other cloth to get the vibe first.
š§µvideos, videos, videos
i think my saving grace was also getting inspired by people sewing online and finishing their stuff. looking at your pattern of choice, thereās a YouTuber i watch named Cindy Leaux who makes a few advanced pieces like this one. she may offer some inspo and encouragement along the way.
š§µ get the seam ripper
in the case of you messing up, seam rippers will most likely not damage the fabric so much. get one to save yourself from any mishaps with the thread
š§µ **extra note ** š§µ
i didnāt look fully in the pattern but you mentioned something about a corset. i am not sure if this is something you are wearing under the dress or adding to it, but i will say i have done boning before and itās doable. you just need to mark out your technique beforehand