My opinion is to remove "Although I am new to Upwork" they already know that.
Further more, write above How can I help you ? Then explain how can you help.
And keep the explanation of your experience down below that.
Also someone before said " remove the much I and me "
so I have over 15 years experience as a full charge bookkeeper. I have extensive experience in Accounts Payable and Accounts Receivable, payroll, payroll tax liabilities, account reconciliation, and banking. I am also skilled in letter composition, web searching, compiling data, data entry, creating spreadsheets, proofreading, and I am able to type 65+ words per minute.
make it start with Over 15 years.. Delete " I have "
and the same for the rest
I don't even have social account also like you, But here's the trick i did, choose to attach social account and choose ( stackoverflow ) when it sends you to the site just register there with the same gmail attached to upwork and its done it will give you 10% for that
after doing it. If still not 100% tell me how much and i'll help you to complete the rest.