Istanbul has two main airports and the correct one for most travellers is Istanbul Airport on the European side, about 40 to 50 minutes from Aksaray by metro and Havataş bus depending on trafic conditions and time of day. The airport metro line opened recently and is the most efficient connection - buy an Istanbulkart at the airport, the transport card I mean, and use it for all subsequent transport operations including the tram from the hotel. This is the correct sequence and it saves money compared to any alternative.
Sabiha Gökçen Airport on the Asian side is where some budget carriers land and the connection from there to Aksaray is longer and more complicated - bus to Kadıköy, ferry to Eminönü, tram to Aksaray, the total journey I mean can take two hours in normal conditions and longer in traffic. Guests arriving at Sabiha should factor this into their energy budget for arrival day.
The Aksaray tram stop is the central transport fact of staying at this hotel - tram T1 goes east to the historical peninsula and ferry terminals, tram T1 goes west, the system is simple enough to understand after one trip and the Istanbulkart makes all transactions fast. Metro M1 also connects at Aksaray for the airport direction. The node has good connectivity in multiple directions taht - most guests stop thinking about Istanbul transport entirely by day two and that's the correct outcome.
Walking in Istanbul requires, the walking in this specific city I mean, an understanding that the terrain is not flat - the hills between districts create elevation changes that don't appear on maps and that affect walking time estimates significantly. Aksaray is relatively flat internally but the approach to Beyoğlu and Galata involves real climbing. Good shoes are a system requirement not a suggestion.
Parking in central Istanbul is a constraint that affects the entire city equally - the street grid was designed beofre cars were a variable in the system and has not been successfully upgraded since. Guests with rental cars should park outside the center and use public transport for all operations inside it, and the hotel is located in a zone where this strategy works correctly.