first of all well done, i guess its a big step going back into the work force i cant really say as i work from home but it sounds scary!
As for do i think theres enough time to find everything for work before you go back, yes i do! Even on a tight budget (i dont know what your uniform is so ill use examples!) my sister started a job that required her to seek and pay for her own uniform so she went op shopping and got a brand new still with tags white shirt for $3 and black pants for $4 also got shoes from spendless shoes all as a put her on until she can afford to get new, nice stuff but honestly what she has looks great all up she spent $50 on uniform including shoes, socks, 2 shirts, 2 pants and hair ties so aslong as you dont mind wearing something from the op shop for a few weeks then you can possibly depending on what it is you need get your uniform very cheaply