What's the best car seat configuration for a RFing 13mo (convertible seat) and FFing 3.5 yo in a sedan? Daycare and our potential preschool are on busy narrow streets with parking parallel to the street.

Is it feasible to have LO1 FFing behind the driver and crawl over/under a RFing convertible to the sidewalk? That's my current plan but I don't want to get it wrong and have to move the seats once installed. The RFing a Chicco Nextfit in an Accord.