How to run a multiple hierarchical regression with both categorical and scale predictors in SPSS?

I’m currently carrying out research for my masters dissertation and i’ve run into a critical issue while trying to analyse my data. I’m a psychology student looking into predictors of male rape myth acceptance. My predictors are Sex, Age, Ethnicity, Estimated monthly income and Homophobia. My criterion variable and Homophobia predictor are both scale data, while Sex, Age, Ethnicity and Estimater monthly income are all categorical data.

I have successfully recoded Sex into a 0= female and 1= male binary variable and also dummy coded all of my other categorical variables. I’ve now come to do the analysis and I’m completely clueless on how I should enter the variables into the hierarchical model and then how to interpret the results after. I’ve only ever conducted a multiple regression using scale predictors before. I am also only familiar with dummy variables when they are entered into a model alone without any other variables as this is as far as our teaching went regarding them. If anyone can give me any help I’d appreciate it!