hello Spacey313
welcome to TP
I agree that this is a situation to go to the manager and seniors for guidance - the manager can give you the home's procedures and the seniors and more experienced staff can share their professional tricks with you
I think it will also become clearer and easier as you get to know each resident and their individual ways
watching the staff in my dad's home, they approach the residents in ways that are positive so there is little room for rejection, and they do not ask the resident if they want to do anything, they speak in a way that assumes the resident will comply, all in a friendly, calm, matter of fact manner
eg "now (name) , it's time for a wash and brush up so lets be off to your room" taking the resident's arm and starting off in the right direction, chatting about something else as they go
I know my dad is more likely to comply if he is talked through each stage ie told what the carer is going to do before they start eg "lets take off your slippers first (name)" and if he feels he is at least a little in control eg "here's the handrail (name), hold onto that as you sit down"
and with some residents, they only do this task in pairs so one can distract and reassure whilst the other gets on
don't think you have to worry about this on your own, chat with other staff and ask for training
best wishes