The best place to start Ringo's solo career for a first timer would probably be-
"Ringo"
"Goodnight Vienna"
"Rotogravure"
I personally like 'Ringorama'. 'Vertical Man', and 'Times Takes Time' the best out Ringo's solo stuff, but the above three are good starting points.
PS- 'Beaucoups of Blues' was good but had the country theme happening. 'Sentimental Journey' had that 40's theme to it and not the rock-n-roll stuff.
Just my opinion!